<dfn id="pwior"></dfn>
  • <source id="pwior"></source>

      1. <u id="pwior"></u><video id="pwior"><mark id="pwior"></mark></video>
      2. <source id="pwior"></source>
        <video id="pwior"></video>
        1. <b id="pwior"><address id="pwior"></address></b>
        2. <video id="pwior"></video>

          January 2017 Newsletter: Volume 4, Issue 1

          A Message from the Director, Jian-Ping Wang

          First of all, congratulations to Caroline Ross and Geoff Beach for their new article in Nature Materials on the first instance of current-induced switching in a magnetic insulator. It’s a truly exciting result. See our news feed for more details.?

          More congratulations are due to Sachin Sapatnekar, who was recently named a 2016 fellow of the Association for Computing Machinery, and Steve Koester, who was recently named a fellow of IEEE. As someone who has seen their consistently excellent work in and out of C-SPIN, I am not surprised by these honors.

          Second, please note that Marie Rahne, our hard-working Center Manager, will be on maternity leave for the next three months. Most of Marie’s duties will be filled by C-SPIN executive assistant Sylvia Hill. You can contact Mike Lotti about news and other communications items.

          Third, in the final year of C-SPIN, I thought it would be good to both look back on our progress and look ahead – as best we can – to see how our work may bear fruit in industry and academia. So I instructed Mike Lotti, our communications coordinator, to write five articles for the final three newsletters, with hopes that we can have something like a history of the Center by the time of our final Annual Review in September. Because of the limited space and time, he only could pick up some highlights – I’ll trust you to dig out more from previous C-SPIN newsletters. In this issue, Lotti recounts the beginning of C-SPIN (which he was a part of) and the interesting journey of Theme 1.?


          Looking Back, Looking Ahead: The Birth of C-SPIN

          Major scientific research centers don’t happen by accident, and they don’t happen easily. They require vision, administrative and organizational expertise, plenty of institutional support, and, of course, a huge amount of high-level scientific expertise. On top of all that, they require cooperation and a lot of money – as in tens of millions of dollars.

          To understand how C-SPIN came to be, it’s best to start with the vision and the money. And the vision starts with Jian-Ping Wang and his team.

          Growth of Non-volatile Spintronics Research

          Magnetic semiconductors have been the mainstream for spintronics research and its application for logic since 1990. Unfortunately, its operation demands low temperatures and so couldn’t support CPUs in PCs, laptops or mobile devices. At a 2004 symposium organized by the University of Alabama on magnetic tunnel junctions (MTJs), Jian-Ping Wang gave a talk on the potential advantages of non-volatile spintronic logic and presented the world’s first experimental demonstration of an MTJ array. Using MTJs for read sensors in hard disk drives and MRAM was well underway by that time, but Wang felt like he was the only one to apply the same principles to the other main parts of a computer. “I pictured people in resource-poor or resource-unstable settings still being able to use computers and maybe even power them up with simple solar cells,” Wang remembers. “I also tried to articulate all the advantages of non-volatile systems, including non-volatile memory.”

          Wang’s talk was, in many ways, the natural product of good training combined with a restless mind. Before joining the University of Minnesota, he taught about and developed magnetic materials for data storage in Singapore for seven years. “I developed more and more familiarity with the field, which led me to keep thinking, ‘There’s so much more we can do with magnetic materials. Why aren’t we doing it?’” says Wang. When he joined the University of Minnesota faculty in 2002 – a “huge decision,” he says, because of his family and his career trajectory – he felt more free to “think big” and “think outside the box.”

          The result of Wang’s 2004 talk in Alabama was a publication (“A Spintronics Full Adder for Magnetic CPU”, IEEE ELECTRON DEVICE LETTERS, 26, 360 (2005)) – but not much else. The alarm bells about the “need to beyond CMOS” weren’t very loud at that point, and Wang notes that nothing beyond GMR was well-known: nobody had made a MTJ logic gate, and very little was known about efficient magnetic materials, much less interfaces and interconnects. Spintronics for “beyond CMOS” computing and memory was not an established discipline, and most spintronics research was siloed or, at most, confined to projects with two or three PIs.

          Fast forward to 2010 and a much-changed world of computing research. The need for “beyond CMOS” materials, devices, and architectures was a common refrain. DARPA and NSF began funding research into alternatives to CMOS, and the Semiconductor Research Corporation (SRC) signaled that it would invest heavily in “beyond CMOS” research centers in the 2013 round of funding. And spintronics had grown: dozens of new materials had been made and characterized, the advantages of perpendicular magnetic anisotropy had been discovered, and there were several new ways to control and convey spin.

          In other words, spintronics was now a mainstream pursuit (especially for non-volatile memory applications), and it was recognized that spintronic computing held the most promise for ultra-low power neuromorphic computing and future artificial intelligence, even if the technologies were admittedly years from development. There was also a strong sense that new measurement and nanofabrication techniques would lead to discoveries that could radically accelerate spintronics development. On top of that, dozens of researchers from industry and academia had collaborated on hundreds of projects, and publications were increasing by the year.

          But even in 2010, there was very little large-scale, coordinated spintronics research in the U.S. That required money, which brings us to SRC and its push to rapidly advance “beyond-CMOS” research.

          SRC: A New Possibility for Spintronics Research

          SRC began in 1982 as way to fund “pre-competitive” computing technology research. Within 10 years, it had pioneered the now-famous TECHCON conferences, sponsored hundreds of research collaborations, welcomed a half-dozen federal agencies into its ranks, and published the groundbreaking National Technology Roadmap Standards (NTRS). In 1997, it established the Focus Center Research Program (FCRP) to accelerate innovative, multi-university research in semiconductor technology with a horizon of eight-plus years through multi-university centers.

          In 2012, FCRP became STARnet. Led by Intel’s Gilroy Vandentop, its mission was big but simple: continue FCRP’s forward-looking sponsorship, but through six new research centers starting in 2013. More specifically, STARnet aimed to drive “beyond-CMOS” research that exceeded even the NTRS horizon. Even more specifically, STARnet’s call for proposals noted the promise of spin-based materials for traditional, quantum, and novel computing architectures. And STARnet was backing up its commitment, promising $25-30 million per five-year research center.

          The Papers: Creating C-SPIN

          Jian-Ping Wang realized that this was, perhaps, a once-in-a-lifetime opportunity to organize the U.S. spintronics research community and build a vertically integrated center for advanced spintronic research. With University of Minnesota colleagues Paul Crowell, Steven Koester, Chris Kim and other researchers, Wang compiled a six-page white paper articulating a Center with the five research themes we have today. After reviewing it, STARnet asked that he combine forces with a team behind another white paper and submit a full proposal. And the rest, as they say, is history.

          Except that it wasn’t easy history to make. Wang and his leadership team spent three months recruiting researchers, negotiating contracts, coordinating drafts, and making one voice out of many. The end result was massive: 50 carefully organized pages of a research proposal, 40 pages of references and biosketches, and over 200 pages of contracts, budgets, budget justifications, and intellectual property agreements. STARnet required a paper submission, so on September 13, 2012 – one day before the proposal was due at STARnet – Wang, Koester, Mike Lotti, and a few graduate students dedicated four or five hours to carefully assembling five (or maybe six) copies of the proposal. We counted pages, re-counted pages, checked and double-checked pages, and made more than a few last-minute edits and substitutions.

          About five weeks later, STARnet informed Wang that C-SPIN would become a reality. Wang quickly arranged for Marie Rahne, who was the coordinator for the Fine Theoretical Physics Institute on the University of Minnesota campus, to be Center Manager.

          And the rest is, indeed, history, even ongoing history. And you can read more about that in the Theme-based articles that will follow.


          Looking Back, Looking Ahead: Theme 1

          “Lots of promising research, not much organization to fulfill that promise.” That’s Jian-Ping Wang’s characterization of spintronics research prior to C-SPIN. Regarding Theme 1, that meant that a few things were well-known, but it was unclear if (and when) substantial breakthroughs would move the field toward viable spintronic memory and logic devices.

          Everyone knew that perpendicular magnetic anisotropy (PMA) materials were essential to robust spintronic computing, for example, but only a few good PMA materials had been characterized by 2012, and no one knew how they would perform when interfacing with other materials – or even if they could survive high-temperature annealing and then function well at room temperature.

          Another example: it was clear that a device like a magnetic tunnel junction (MTJ) would be necessary, but no one knew how such devices would be used (replacements for FETs? translators of spin information to CMOS systems?) or if they could be small enough to compete with CMOS devices.

          The Plan

          For C-SPIN leadership, the way to address these (and many other) issues was simple: create an infrastructure that integrated the work of fabricators, experimentalists, measurement experts, and theoreticians so that hundreds of samples, interfaces, and proto-devices could be developed and characterized. More specifically, C-SPIN proposed to:

          • Develop and characterize dozens (maybe hundreds) of new PMA materials
          • Develop new ways of depositing magnetic oxides and magneto-electric materials
          • Develop new techniques for nanopatterning magnetic structures, especially MTJs
          • Fabricate spintronic materials and devices that could be switched with ultra-low voltage

          Implicit in the initial C-SPIN grant proposal was the expectation of surprises: some promising materials and devices wouldn’t work out, and some that were not-so-promising (or even unknown) would turn out to be better than anyone could have imagined.

          Theme 1 Accomplishments

          The Theme 1 team – led by Chia-Ling Chien and Caroline Ross – has 13 PIs, seven cross-Theme PIs, and dozens of graduate students and post docs. It has basically accomplished what it promised four-and-a-half years ago. Dozens of new materials have been fabricated and characterized, along with dozens of material combinations and proto-devices. Nanopatterning procedures have improved, resulting in smaller and smaller proto-devices, some with diameters less than 20 nm. Materials and proto-devices have been switched with ultra-low voltage, including some antiferromagnetic materials. Jian-Ping Wang highlights six specific accomplishments:

          • Two new types of magnetic insulators with bulk perpendicular anisotropy have been developed and demonstrated with spin Hall switching.
          • Perpendicular super lattice Heusler alloy materials, which were predicted by Bill Butler, have been fabricated for the first time.
          • Magnetic tunnel junctions with FePd synthetic antiferromagnetic structures have been demonstrated for the first time and proven to be excellent for 3D logic and memory.
          • Voltage-controlled exchange bias Cr2O3 stacks have been demonstrated with higher Neel temperature with B doping, and an ultra-thin Cr2O3 film down to 10 nm without leakage was successfully demonstrated.
          • Voltage-controlled magnetism for nanoscale magnetic devices has been demonstrated several times.
          • Spin damping is much better understood, both in terms of measuring it and understanding its correlation with atomic structure. This has led (and will lead) to more rapid development of spintronic materials and devices.

          Looking Ahead

          Of course, Theme 1 research is not over. Over the next seven months, Theme 1 PIs hope to further demonstrate 1) A voltage-controlled exchange bias switchable memory cell; 2) Electrical field induced switching in MTJs with bulk PMA; 3) Magnetoelectrically switching Heusler alloy structures; and 4) External field free switching of a PMA structure using the spin Hall effect.

          It’s safe to say that Theme 1 has fulfilled STARnet’s original goal of producing research and technologies that will fulfill needs on an 8-year time frame. All the highlights noted above – along with many others – are ready for accelerated development in academia and industry and could be in memory, logic, quantum computing, and other applications by 2020.

          In other words, Theme 1’s integrated structure has quietly opened the floodgates for future spintronic computing and memory.


          C-SPIN Associate Director, Prof. Steven Koester Named IEEE Fellow

          Steve Koester Steve Koester

          University of Minnesota Prof. Steven Koester has been named an IEEE Fellow effective January 2017. He is cited by the IEEE for “contributions to group-IV electronic and photonic devices.” Prof. Koester’s research focuses on novel electronic, photonic and sensing device concepts with an emphasis on graphene and other 2D materials. He has authored or co-authored over 200 technical publications, conference presentations, and book chapters, and holds 65 United States patents. Prof. Koester is also an associate editor for IEEE Electron Device Letters.

          Steven Koester earned his doctoral degree in 1995 from the University of California, Santa Barbara. From 1997 to 2010 he was a research staff member at the IBM T. J. Watson Research Center and performed research on a variety of electronic and optoelectronic devices, with an emphasis on those utilizing the Si/SiGe material system. From 2006-2010 he served as manager of Exploratory Technology at IBM Research where his team investigated advanced devices and integration concepts for use in future generations of microprocessor technology. Since 2010, he has been a Professor with the Department Electrical and Computer Engineering at the University of Minnesota.

          The grade of Fellow, the highest membership grade, is conferred by the IEEE Board of Directors on individuals with an outstanding record of accomplishments in an IEEE field of interest. Fewer than one-tenth of one percent of the total number of voting members are elevated as Fellows. The grade is recognized by the technical community as a prestigious honor and an important career achievement.



          C-SPIN PI, Prof. Sachin Sapatnekar Named ACM Fellow

          Sachin Sapatnekar Sachin Sapatnekar

          The Association for Computing Machinery has named Prof. Sachin Sapatnekar as one of its 2016 ACM Fellows for “contributions to the enhancement of performance and reliability in integrated circuits.” Prof. Sapatnekar’s research focuses on computer-aided design (CAD) of VLSI systems.?Some of the? specific problems that his research team have worked on recently include spintronics-based design, thermal analysis, reliability, timing analysis and optimization, power grid analysis, and 3D integration.

          Sachin Sapatnekar earned his doctoral degree in 1992 from the University of Illinois at Urbana-Champaign. From 1992 to 1997, he was an Assistant Professor in the Department of Electrical and Computer Engineering at Iowa State University. He joined the Department of Electrical and Computer Engineering at the University of Minnesota in 1997, and holds the Robert and Marjorie Henle Chair and the Distinguished McKnight University Professorship. He has served on the editorial boards of several IEEE journals, and also as Editor-in-Chief of the IEEE Transactions on CAD. He has been technical program chair and general chair for several conferences. These include the Design Automation Conference (DAC), and the International Symposium on Physical Design (ISPD). He is a recipient of the NSF Career Award, the SRC Technical Excellence Award, the SIA University Researcher Award, ?and several Best Paper Awards at the DAC and other conferences. Most recently, he received the ICCAD Ten-Year Retrospective Most Influential Paper Award for the second time. He is also a Fellow of IEEE.

          The Fellows program was established by the ACM in 1993 to recognize the professional, technical and leadership-based contributions of its outstanding members. The number of members recognized as Fellows cannot exceed one percent of the number of ACM professional members. The 2016 Fellows have been recognized for contributions in areas that impact our work and daily life. These include cloud computing, computer security, data science, Internet routing and security, large-scale distributed computing, mobile computing, spoken-language processing and theoretical computer science.



          Student and Post-Doc Profiles

          Andy Quindeau, Postdoctoral Researcher with Prof. Caroline Ross at MIT

          Andy Quindeau Andy Quindeau

          My work involves the fabrication and characterization of perpendicularly magnetized ferromagnetic insulators (here Tm3Fe5O12) that are notoriously difficult to synthesize (Theme 1). I collaborate with C-SPIN affiliates to produce spintronic devices that use spin currents to switch these ferromagnets. Ultimately, the implementation of perpendicular ferromagnetic insulators will be better than metallic devices in terms of switching efficiency and could potentially lead to dissipationless current transport in conjunction with topological insulators. 

          I am also working on the ferromagnetic resonance characterization of thin films in order to quantify important properties like ferromagnetic damping as a function of temperature. My research as a C-SPIN affiliate over the last year has led to two publications: the first one involves the magnetic characterization of the perpendicular magnetic insulator thulium iron garnet, and the second one describes the first demonstration of a ferromagnetic insulator switched by a pure spin current.

          My fascination for materials science arose from the fact that material properties can vary dramatically just by a change in crystal structure. Carbon, for example, possesses very good conducting properties as graphite but is one of the best insulators when a diamond. As I got more experience in the field of low dimensional electronic systems, multiferroics, and (especially) magnetism, I developed a strong desire to understand and combine different materials and properties, which is perfectly exemplified throughout the field of spintronics.

          I want to continue engineering-oriented research that is directed toward real device applications. I highly value my experience of fundamental research on 2-dimensional electron systems, but I believe that I am most productive in a goal-driven research/engineering environment, where a deep fundamental and intuitive understanding of a variety of physical phenomena plays a crucial role – but not the only role. This is why I am most interested in a career devoted to hands-on, state-of-the-art technology innovation in the tech industry.


          James Kally, Ph.D. Candidate with Prof. Nitin Samarth at Penn State University

          James Kally James Kally

          I am currently working within Theme 2 to utilize topological insulators as spin injectors and spin channels. Topological insulators have the exciting property of conducting surface states where the spin of the electron is “locked” with its momentum. Since the direction of the current defines the electron’s spin orientation in a topological insulator, they could be very efficient for switching a magnet. In particular, I work with topological insulators Bi2Se3 and (Bi,Sb)2Te3, which I grow by molecular beam epitaxy on a variety of substrates in Prof. Nitin Samarth’s lab at Penn State. ?

          I am also working with other C-SPIN groups on 1) interfacing topological insulators with ferromagnetic insulators and graphene, and 2) growing topological insulator thin films for magnetic junctions. I have various publications in progress as a first author and as a contributing author; they all indicate that topological insulators could be efficient for spin devices. As an undergraduate, I studied the opening of a gap in the energy states in NdNiO3 by electron tunneling as the material undergoes a metal-to-insulator transition.

          I became involved in research through a summer internship in Prof. Jim Allen’s lab at UCSB before starting a bachelor of science program in physics at UCSB. From there it has been one fascinating project after another at UCSB, Trinity College Dublin, HRL Laboratories, and Penn State. It is so rewarding after sometimes struggling for months to finally get a material to grow properly or see exciting data. One defining moment in my second year at UCSB: I was with my advisor, his post-doc, and a scientist from Intel who was working with SRC. They were discussing an idea for magnetic logic using frustrated magnetism in a triangle pattern. That moment felt like we were planning the future of electronics. Working in spintronics leads to so many of these moments – you feel like you can create something impactful.

          I am planning on moving to R&D in industry after I graduate. I want to continue developing materials for device applications. I am interested to see what advances will be incorporated in future microprocessors, and I want to be a part of those advances.

           
           
          高清无码中文字幕无线 亚洲国产精品无码中文字幕 中文首页 国产 亚洲
        3. 江门市
        4. 奇米影视777国产情侣视频mpv水野朝阳在线在线大香蕉视频现现播
        5. 亚洲欧洲自拍拍偷 亚洲自偷自偷图片 网友自拍 偷拍 校园
        6. 老司机影视_老司机高清精品视频观看_奇米网在线观看视频
        7. K频道网址导航_k频道在线_k频道国产福利频道_k频道精品视频
        8. 日本护士一级毛片_日本高清视频影片www_免费啪视频在线看视频
        9. 大量偷拍情侣自拍视频茄子视频官网99热在线视频观看免费91自拍视频
        10. 天天看大片特色视频 天天看片ty嘟嘟 天天看天天拍天天谢
        11. 与女神同行 电影|未来影院|网友自拍区|成为人视频免费视频免费观看
        12. 青草青草久热精品视频 青草青草久热精品视频 超频在线免费观看视频,青草青草视频2免费观看
        13. 波多野结衣巨乳教师,高清无码AV在线观看,波多野结衣在线看免费
        14. 大象蕉在线观看免费视频_大象蕉中文字幕在线观看最新网址
        15. 日本护士一级毛片_日本高清视频影片www_免费啪视频在线看视频
        16. 无码不卡中文字幕在线视频,无码不卡免费高清中文字幕,无码的高清...
        17. 中文字幕第一页在线,欧美AⅤ,男人的天堂成人视频,婷婷五月综合色啪在线观看
        18. 宁蒗
        19. 夜夜橾天天橾b在线观看_天天日日狠狠 2018_天天啪久久爱视频精品
        20. 国产自拍视频_偷拍视频_国产大香蕉视频播放_国产偷拍国产精品网天天色情
        21. 日久干草青青视频免费|浴室一家亲
        22. 丰原市
        23. 在线电影免费观看奇米影视777操操,超碰大香蕉午夜视频在线国产
        24. 三级播三方免费观看aⅴ在线视频男人的天堂琪琪影院yy480线观看
        25. 盘山县
        26. 精品 在线 视频 亚洲-国产精品高清视频免费-精品国产自在线拍-国产精品在线手机视频,,,
        27. 长垣县
        28. 老鸭窝在线观看va久久爱自拍自干偷拍自拍10最新午夜国内自拍
        29. 民勤县
        30. 鲁甸县
        31. 益阳市
        32. 快播成人a,免费国产一级av 片,日本毛片免费韩国,av天堂电影网在线观看
        33. 国产曰韩无码亚洲视频亚洲Va国产在线观看色噜噜狠狠综合影院
        34. 松潘县
        35. 陵川县
        36. 超碰最新地址97碰碰在线看视频免费亚洲啪啪成人在线资源
        37. 中山市
        38. 国产亚洲精品福利视频,高清国产午夜福利在线视频,国产私拍福利精品视频
        39. 连江县
        40. 日本熟妇色在线视频 日本视频网站www色 日本视频高清免费观看
        41. 五月天婷婷_日韩中文字幕_伊人人大蕉_caonila 在线视频分享
        42. 人人插人人艹免费视频,国人综干合综网,国产姐妹在线第1页
        43. 午夜影院a小清新五福影院凹凸视频1374TOKYOHOT-东京热插爆大奶AV
        44. 伊人大杳焦在久久综合4438色倩网站一本道久草不卡日韩无码2019
        45. 成电影人网免费点播 成人网 站免费观看,668成人网站免费,成人网站
        46. 欧美大片免费流量 福利免费院欧美一级毛片免费高清我 免费毛片
        47. 成 人影片 免费观看 成人 h动 漫在线播放 亚洲人成网站在线播放
        48. 在线成本人视频动漫,成本人动画片在线观看,亚洲人成电影网站免费
        49. va亚洲va天堂va视频在线国产亚洲视频中文字幕野狼醉春楼福利视频
        50. 加比勒久久综合久久爱 青青青草网站免费观看 久久爱在线视久 99久久爱免费视频视频 久久婷婷五月综合色啪 99久久re6精品首页 久久人人97超碰
        51. 图片区 偷拍区 小说区桥本有菜?在线观看大陆国产Av国际对白涉涉爱
        52. 操逼网站夜夜干干伊人9在线观看免费观看1自拍超碰caoporn
        53. 一级A做爰片免费视频_免费黄片视频在线观看,黄页网址大全
        54. 国产 亚洲 中文字幕 久久网 中文字幕人妻熟女人妻 亚洲久久久久久中文字幕
        55. 韩国无码片一本道手机在线看无码a_亚洲阿v天堂最新版本2019
        56. 2019高清无码,噜噜噜手机在线版,疯狂抽插正在播放,在线观看
        57. 一本道理高清在线播放_一本道理在线不卡免费_一本道久在线88综合
        58. 天天看高清久视频,天天看综合天天看,天天看高清在线播放
        59. 成 人 h动 漫在线播放 纯肉的日本动漫 在线看 在线成本人视频动漫
        60. 一级a做爰片就在线看-免费网站看v片在线-国内偷拍在线精品
        61. 成年美女黄网站色大全_成av人电影在线观看_成 人影片 免费观看
        62. 好吊色青青青国产_一本久道热线在线 视频_他也色他也色视频_日本高清视频免费版毛片
        63. 夜夜射天天拍在线 日日日射夜2017日日啪 2018天天啪天天爽国产
        64. 亚洲久久久久久中文字幕,国产 亚洲 中文字幕 久久网,久久综合色一.
        65. 亚洲欧美免费无码专区 亚洲男人天堂.日本一本道高清无码AV,最新高清无码专区.在线观看,欧美阿v高清资源在线
        66. 网友自拍 偷拍 校园,福利大片视频在线观看,欧美 在线 成人
        67. 韩国电影网_韩国电影_三级_韩国伦理片_伦理电影手机在线观看
        68. 青草青草久热精品视频 青草青草久热精品视频 超频在线免费观看视频,青草青草视频2免费观看
        69. 五月天婷婷久久啪,2019久久精品综合查询,万人靠青青视频,2019精品国产在线
        70. 亚洲中文字幕国产综合 字幕国产在线播放 亚洲久久无码中文字幕
        71. 久草在线 新免费观看 啪啪干 久草 大香蕉 免费在线aⅴ 伊人香蕉网久草
        72. 视频一区亚洲视频无码,全国女厕所偷拍全集,偷拍国内女厕所在线
        73. 准备好纸巾深夜福视频在线看午夜福利片午夜福利午夜福利集福利
        74. 亚洲人成视频在线播放 - 男人都来的每日更新的免费在线视频网!
        75. 偷拍久久国产视频|老司机在线国产|亚洲偷拍|偷自拍视频
        76. 2019伦理片最新欧美夜夜爽天天干老司机电影天堂手机版午夜福利1000在线
        77. 国产亚洲精品福利视频国内精品福利自拍在线视频国内精品自拍视频在线播放
        78. 天堂AV在线AV,国产亚洲视频中文字幕,国内国内精品视频,以满足广大秒拍控为宗旨的视频网
        79. 在线播放的网站你懂的_男人网站你懂的_在线播放av的网站_不用播放..
        80. 东乌珠穆沁旗
        81. 午夜福利1000集福利92757-4438x全国大免-欧美群交性色-2018天天看夜夜看狠狠看-日本一道本高清专区免费
        82. 费在线观看 ,黄色视频做爰视频,,,少妻艳欲高清在线观看
        83. 青娱乐在线播放观看天天操_天天干情色网_天天射影院_伊人大香蕉
        84. 夏津县
        85. 樟树市
        86. 亚洲欧美中文日韩v在线,四虎澳门高清在线观看,国产自拍,在线观看
        87. 新邵县
        88. 福利免费视频,草莓视频,草莓成人短片,草莓成人短片线上看
        89. 国产a片-人人爱大香蕉-男人的天堂v-伊人大香蕉网站-大香蕉在线
        90. 在线中文字幕亚洲日韩高清无码中文字幕视频无码不卡中文字幕在线视频
        91. 大香焦依人在钱免费版 久久乐tv免费,久久乐免费38,182ty大香焦官网
        92. 诏安县
        93. 望奎县
        94. 国产自拍视频_偷拍视频_国产大香蕉视频播放_国产偷拍国产精品网天天色情
        95. 在线中文字幕亚洲日韩高清无码中文字幕视频无码不卡中文字幕在线视频
        96. 隆尧县
        97. 小A影院唐朝历代皇帝台湾天天she综合性网好男影院,日本三级片
        98. 黑龙江省
        99. 国拍自产免费国产自产区44页 b8yy私人影院 好看的av电影
        100. 婷婷六月丁香综合基地,欧美 日韩 国产 另类 图片区,2017毛片在线观看视频,97视频
        101. 云浮市
        102. 好看的无码AV_经典无码AV_高清无码AV_PLAY 视频 海量 A V 资源
        103. 丁香五月开心婷婷综合 五月婷婷开心缴情网 开心网五月
        104. 欧美免费观看全部_久久女婷五月综合色啪
        105. 波多野结衣巨乳教师,高清无码AV在线观看,波多野结衣在线看免费
        106. 亚洲人成网站在线播放 亚洲人成电影网站免费,夫妻自拍视频网站
        107. 欧美成年性色生活片 毛片_在线中文字幕亚洲日韩_成 人国产在线观看
        108. 大香蕉网-伊人在线大香蕉-大香蕉-大香蕉网站-大香蕉大香蕉电影-大香蕉网
        109. 四房播播开心在线播放,日本红怡院丨在线,超碰在线视频人人爱,他也色他也色视频
        110. 国产精品毛片在线视频_最新无码国产在线视频
        111. 色色色色色 - 日本视频高清免费观看
        112. 定远县
        113. 一级香蕉视频在线观看 一级大香蕉视频在线观看做爰片住线观看
        114. 开封县
        115. 日久干草青青视频免费_日本近親倫亂中文字幕av視頻
        116. 亚洲中文字幕乱倫在线,欧美成人网,成版人app抖音小奶狗视频
        117. 日本三级_香港三级_韩国电影三级大全2017_黃色带三级_三级片
        118. 日本色情高清视频-日本色情高清-日本高清视频网站
        119. 午夜激情影院,深夜福利直播平台人人澡超视频1024论坛青青草无码
        120. 香蕉依人大香蕉综合网,香蕉影视在线观看免费,依人大香蕉新地址
        121. 奇米影视首页撸撸狠拨阴员1伊人大香蕉久久天天啪-奇米第四色
        122. 亚洲久久久久久中文字幕,亚洲久久无码中文字幕,久99久在线中文字幕
        123. 奇米第四手机在线观看丁香享婷婷,最新地址获取亚洲在线看天堂网
        124. 国产亚洲人成在线视频,欧美A一片,成 人 国产系列,日逼视频
        125. 国产在线视频不卡一天天啪天天舔天天射啪一啪鲁一鲁,亚洲毛片
        126. 色色影院_哥哥干影院_哥哥干在线视频_哥哥干妹妹操电影
        127. 大量偷拍情侣自拍视频茄子视频官网99热在线视频观看免费91自拍视频
        128. 亚洲香蕉视频在线播放_伊人大香蕉久久网_精品国产自在线拍
        129. 青青青草网站免费观看-青青青视频在线观看真实强奷视频在线观看
        130. 浏阳市
        131. 久久国产自偷拍,偷拍自偷亚洲欧美色999,HEZYO高清 一本道 综合
        132. 色姑娘久久综合网天天 五月天丁香婷深爱综合 开心婷婷五月综合基地 色姑娘综合站,亚洲欧洲视频一区,久草在线新时代的视觉,在线看的性视频网站
        133. 国语自产精品视频在_九九热线有精品视频6
        134. 无码不卡中文字幕在线视频,无码不卡免费高清中文字幕,无码的高清...
        135. 偷拍久久国产视频|老司机在线国产|亚洲偷拍|2017高清国产偷拍在线
        136. 偷拍自怕亚洲视频在线观看,日本极度色诱,6,综合欧美五月丁香五,
        137. 啪一啪鲁一鲁_日日嫂_2017狠狠射_欧美A片在线观看2_欧019在线视频
        138. 亚洲手机在线人成视频_亚洲人成视频在线播放_亚洲人成视频在线
        139. 一个色综合亚洲色综合,日日干夜夜猛射,最新一本道 久久最新2018啪啪自拍视频
        140. 天天嚕2017最新视频免费-天天日影院-夜夜橾天天橾b免费视频-天天碰天天摸公开视频
        141. 成人快播电影,国产视频偷拍a在线观看,2018夜夜日天天爽
        142. 屯门区
        143. 五月婷婷开心综合开,91porn,中文字幕大香蕉在线看,你懂的电影
        144. 化隆
        145. 图片区偷拍区 小说区,小说区视频区照片区,小说区 图片区 综合区
        146. 婷婷六月丁香综合基地,欧美 日韩 国产 另类 图片区,2017毛片在线观看视频,97视频
        147. 和静县
        148. K频道网址导航_k频道在线_k频道国产福利频道_k频道精品视频
        149. 绥宁县
        150. 国产在线精品视频免费观看
        151. 天等县
        152. 五月天婷婷久久啪,2019久久精品综合查询,万人靠青青视频,2019精品国产在线
        153. 大香蕉爱玖玖爱大香蕉台湾妹综合网亚洲欧美中文字幕,国产av在线
        154. 中文字幕无线观看在 2017中文字字幕66页 中文字幕极速在线观看
        155. 扬州市
        156. 色琪琪av男人的天堂-琪琪see色原网色原网站-天天谢天天谢天天要-欧美成人视频
        157. 日本AV精品中文字幕 亚洲AV国产AV手机在线一区 小草青青手机在线视频
        158. 一本道dvd手机在线观看 日本毛片高清免费视频 日本免费的毛片视频
        159. 淮北市
        160. 97色伦图片 97色伦图片影院 97色色 97色伦图片在线影院
        161. 峡江县
        162. 草久久爱久久 青青草视频 久草草在线新免费观看 青青青草免费观看
        163. 临汾市
        164. 免费做暧暧暖免费观看日本-在线v片免费观看视频-韩国黄页网络站免费
        165. 福利视频_国产福利视频拍拍拍_国产亚洲精品福利视频_在线观看深夜福利视频_国产福利视频在线观看福利_第一福利在线永久视频_美女自卫慰视频福利www_午夜福利视频
        166. 久久爱视频高清影院一级a做爰视频免费观看大香蕉在线线观看免费
        167. 在线中文字幕亚洲日韩高清无码中文字幕视频无码不卡中文字幕在线视频
        168. 朝阳市
        169. 2019国拍自产在线国产久久爱在线看线看擼擼综合色_欧美色图片
        170. 四虎永久在线精品免费 国产亚洲精品福利视频在线观看 久久精品久精品99热
        171. 亚洲香蕉人妻在线视频,亚洲大香蕉视频,亚洲AV有码在线天堂
        172. 巨乳视频大全_巨乳视频全集_在线播放-日本免费大巨乳在线视频
        173. 在线精品国产在线视频 国产亚洲精品俞拍视频 精品国产福利在线视频
        174. 男人的天堂天堂AV在线AV国产亚洲视频中文字幕国内国内精品视频男人的天堂是一个专业为广大秒拍控分析秒拍福利视频的资源网站,
        175. 国产伦视频电影网站-亚洲日韩国产无码-在线精品国产在线视频
        176. 天天网首页,色蝴蝶综合,天天操色网,天天逼逼,要草逼网,天天干
        177. 美女天天看高清影视在线_午夜神器天天看免费高清影视_国产高清
        178. 婷婷开心色四房播播|久就在现精品草|91在线观看官网
        179. 日本三级_香港三级_三级片网站_成人网_成人电影欧美高清整片
        180. 2019在线视频在线av电影亚洲欧美中文日韩视频欧美av,啪一啪鲁一鲁
        181. 亚洲欧美免费无码专区 亚洲男人天堂.日本一本道高清无码AV,最新高清无码专区.在线观看,欧美阿v高清资源在线
        182. 一级A做爰片免费视频_免费黄片视频在线观看_番茄社区免费观看
        183. 2019最新中文字幕在线观看,电影在线观看,2019中文字字幕在线不卡
        184. 六九公社-欧美AV在线,国产av在线,免费国产偷拍a在线视频 - 69公社
        185. 韩国电影网_韩国电影_三级_韩国伦理片_伦理电影手机在线观看
        186. 精品 在线 视频 亚洲-国产精品高清视频免费-精品国产自在线拍-国产精品在线手机视频,,,
        187. 婷婷开心色四房播播|四虎影视在线地址最新|91国产精品情侣愉拍|伊人免费视频
        188. 91热爆,亚洲火爆视频在线观看,亚洲区偷拍自拍29p,偷拍亚洲
        189. 青青草a免费线观,青草青草视频2免费观看,最新青草高清视频
        190. 大量偷拍情侣自拍视频_电影日本强奷在线播放_自拍 偷拍 综合图区
        191. 色偷偷男人的天堂a v,狠狠天天久久大香蕉_免费视频_奇米影视
        192. 2019最新国产不卡a 国内2018自拍视频在线 国内精品2018视频在线,
        193. 国产aⅴ视频视频不卡在线五月婷婷开心?中文字幕国产处女大香蕉
        194. av日本,婷婷色香五月综合缴缴情,怡红院成人,五月丁香综合缴情六月
        195. 天天干夜夜爱 天天色播 天天射天天舔
        196. 一本道久在道最新2019_中文字幕破除无线码_中文字幕无码在线
        197. 大色窝夜夜撸在线视频在线观看,播播影院伦理私人影院,神马电影院伦理电影播放,神马影视伦理片6080
        198. 奇米影视盒 奇米影视播放器 奇米第四手机在线观看 奇米第四色
        199. 青青青国产在线观看手机免费_青草青草久热精品视频_青青精品国产自在线拍
        200. 什邡市
        201. 欧美Av无码高清在线_日本无码高清免费_在线中文字幕日本无码欧美
        202. 中文字幕无线观看在 2017中文字字幕66页 中文字幕极速在线观看