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Materials and processes for innovative next-generation devices
Research Results
Phase I Phase II Phase III

2007 Researchers

Seiya KASAI Eiji SAITOH Masashi SHIRAISHI
Y.K. TAKAHASHI Tomoyasu TANIYAMA Arata TSUKAMOTO
Naoki FUKATA Shuichi MURAKAMI Takeshi YASUDA
Akinobu YAMAGUCHI Katsunori WAKABAYASHI  

Arata TSUKAMOTO

paper
[14] I. Radu, K. Vahaplar, C. Stamm, T. Kachel, N. Pontius, H. A. Durr, T. A. Ostler, J. Barker, R. F. L. Evans, R. W. Chantrell, A. Tsukamoto, A. Itoh, A. Kirilyuk, Th. Rasing and A. V. Kimel, "Transient ferromagnetic-like state mediating ultrafast reversal of antiferromagnetically coupled spins", Nature, doi:10.1038 (2011).
[13] A. Tsukamoto, T. Sato, S. Toriumi, and A. Itoh, "Precessional switching by ultrashort pulse laser: Beyond room temperature ferromagnetic resonance limit", J. Appl. Phys., Vol. 109, 07D302 (2011).
[12] K. Nakagawa, Y. Ashizawa, S. Ohnuki, A. Itoh, and A. Tsukamoto, "Confined Circularly Polarized Light Generated by Nano-size Aperture for High Density All-Optical Magnetic Recording", J. Appl. Phys., Vol. 109, 07B735 (2011).
[11] K. Mizusawa, A. Tsukamoto, and A. Itoh, "FePt grains for magnetic storage on layer of self-assembled silica Nanoparticles", J. Mater. Res., Vol. 26 (2), pp 205-208 (2011).
[10] A. Tsukamoto, and A. Itoh, "Ultrafast manipulation and measurements of magnetization by ultra short pulsed laser", J. Res. Inst. Sci. Tech., Nihon Univ., Vol. 122, 25-33 (2010).
[9] A. Itoh and A. Tsukamoto, “Hybrid magnetic recording media on FePt grains and self-assembled nano-structured layers”, J. Mag. Soc. Jpn. 33(6-2) pp. 507-512 (2009).
[8] Y. Moriyama, Y. Ashizawa, K. Nakagawa, T. Sako, A. Tsukamoto, and A. Itoh, “Heat Conduction Analysis of Magnetic Recording Media for Thermally Assisted Magnetic Recording”, J. Mag. Soc. Jpn., 33(6-2) pp. 517-520 (2009).
[7] K. Vahaplar, A. M. Kalashnikova, A. V. Kimel, D. Hinzke, U. Nowak, R. Chantrell, A. Tsukamoto, A. Itoh, A. Kirilyuk, and Th. Rasing, “Ultrafast Path for Optical Magnetization Reversal via a Strongly Nonequilibrium State”, Phys. Rev. Lett., Vol. 103, 117201-(pp. 1-4) (2009).
[6] J. Otsuki, K. Namiki, Y. Arai, M. Amano, H. Sawai, A. Tsukamoto, and T. Hagiwara, “Face-on and Columnar Porphyrin Assemblies at Solid/Liquid Interface on HOPG”, Chem. Lett., Vol.38, No.6, pp. 570-571 (2009).
[5] K. Yoshino, F. Chino, A. Tsukamoto and A. Itoh, “Coercivity of TbFeCo/FePt Grain Composite Films”, J. Magn. Soc. Jpn., Vol. 33, pp. 212-215 (2009).
[4] F. Chino, A. Tsukamoto, A. Itoh, “Domain shape of CGC-like films with under layers of periodic isolated FePt particles”, J. Magn. Soc. Jpn., Vol. 32 (22), pp. 135–139 (2008).
[3] C. D. Stanciu, A. Tsukamoto, A. V. Kimel, F. Hansteen, A. Kirilyuk, A. Itoh and Th. Rasing, “Subpicosecond Magnetization Reversal across Ferrimagnetic Compensation Points”, Phys. Rev. Lett., Vol. 99, 217204-(pp. 1-4) (2007).
[2] C. D. Stanciu, F. Hansteen, A. V. Kimel, A. Kirilyuk, A. Tsukamoto, A. Itoh and Th. Rasing, “All optical femtosecond magnetic recording”, Phys. Rev. Lett., Vol. 99, 047601-(pp. 1-4) (2007).
[1] C. D. Stanciu, A. V. Kimel, F. Hansteen, A. Tsukamoto, A. Itoh, A. Kirilyuk, and Th. Rasing, “Ultrafast interaction of the angular momentum of photons with spins in the metallic amorphous alloy GdFeCo”, Phys. Rev. Lett., Vol. 98, 207401-(pp. 1-4) (2007).
presentation
[31] A. Tsukamoto, T. Sato, T. Shimizu, S. Toriumi, R. Shimizu, and A. Itoh, "Laser induced precessional switching in ferrimagnetic GdFeCo", MORIS2011(2011/6/21~6/24).
[30] Takeshi Ota, Yoshito Ashizawa, Katsuji Nakagawa, and Akiyoshi Itoh, "Near-field Intensity Analysis with Inclined Plasmon Antenna for High Density Thermally Assisted Magnetic Recording", International Conference of AUMS 2010, Jeju Island, Korea (2010/12/8).
[29] Katsuji Nakagawa, Yoshito Ashizawa, Shinichiro Ohnuki, Akiyoshi Itoh, and Arata Tsukamoto, "Confined Circularly Polarized Light Generated by Nano-size Aperture for High Density All-Optical Magnetic Recording", 55th Annual Conference on Magnetism & Magnetic Materials, Atlanta, Georgia, USA (2010/11/18).
[28] A. Itoh, J. Yeh, and A. Tsukamoto, "Nano convex pattern substrate prepared by self-assembled silica particles and dry etching process for high-density magnetic recording media", 55th Annual Conference on Magnetism & Magnetic Materials, Atlanta, Georgia, USA (2010/11/16).
[27] A. Tsukamoto, T. Sato, S. Toriumi, and A. Itoh, "Precessional switching by ultrafast laser: beyond room temperature FMR limit", 55th Annual Conference on Magnetism & Magnetic Materials, Atlanta, Georgia, USA (2010/11/15).
[26] I. Radu, K. Vahaplar, C. Stamm, T. Kachel, N. Pontius, H. Dürr, T.A. Ostler, J. Barker, R.F.L. Evans, R.W. Chantrell, A. Tsukamoto, A. Itoh, A. Kirilyuk, Th. Rasing, and A.V. Kimel, "An Element-specific View on Ultrafast Magnetization Reversal of ferromagnetic GdFeCo", International workshop on Laser-induced magnetization dynamics in nanostructure, Stoos, Switzerland (2010/10/6).
[25] Loïc Le Guyader, E. Mengotti, A. Weber, A. Kleibert, L. Joly, R. Pisarev, A. Tsukamoto, A. Itoh, A. Kirilyuk, L. Heyderman, F. Nolting, Th. Rasing, and A. Kimel, "Laser induced magnetization dynamics in structured systems", International workshop on Laser-induced magnetization dynamics in nanostructure, Stoos, Switzerland (2010/10/7).
[24] K. Vahaplar, A. M. Kalashnikova, A. V. Kimel, D. Hinzke, U. Nowak, R. Chantrell, A. Tsukamoto, A. Itoh, A. Kirilyuk, and Th. Rasing, "Investigation of Ultrafast Magnetization Reversal via a Nonequilibrium State", International workshop on Laser-induced magnetization dynamics in nanostructure, Stoos, Switzerland (2010/10/7).
[23] 森山 優一, 長 勇次, 芦澤 好人, 中川 活二, 塚本 新, 伊藤 彰義, "熱アシスト磁気記録用記録媒体における熱分布解析", 電気学会 基礎・材料・共通部門大会, 琉球大学工学部 (Japanese, 2010/9/14).
[22] 浅見幸伸, 塚本新, 伊藤彰義, "FePt孤立微粒子への近接場光を用いたTAMRシミュレーション", 第34回 日本磁気学会学術講演会, 筑波, 茨城 (Japanese, 2010/9/4).
[21] T. Sato, S. Toriumi, A. Tsukamoto, and A. Itoh, "Composition control for reducing magnetization reversal time in ferrimagnetic GdFeCo", ISAMMA 2010 (International Symposium on Advanced Magnetic Materials and Applications 2010), Sendai, Japan (2010/7/16).
[20] I. Radu, K. Vahaplar, A. Kimel, C. Stamm, T. Kache, N. Pontius, H. Duerr, A. Tsukamoto, A. Kirilyuk, and Th. Rasing, "Element-specific Study of the Ultrafast Magnetization Switching on GdFeCo", DPG-Verhandlungen 2010, Regensburg, Germany (2010/3/24).
[19] A. Tsukamoto, T. Sato, T. Shimizu, S. Toriumi and A. Itoh, “Magnetic damping property near ferrimagnetic compensation points in GdFeCo”, 11th Joint MMM-Intermag conference, Washington DC USA, January 21, 2010.
[18] K. Vahaplar, A. M. Kalashnikova, A. V. Kimel, D. Hinzke, U. Nowak, R. Chantrell, A. Tsukamoto, A. Itoh, A. Kirilyuk and T. Rasing, “Ultrafast Visualization of All-Optical Magnetization Reversal in GdFeCo-films” , 11th Joint MMM-Intermag conference, Washington DC USA, January 19, 2010.
[17] A. Itoh, A. Tsukamoto, Y. Nikkou, S. Okame and K. Mizusawa, “FePt grains on self-assembled nano-silica particles”, 11th Joint MMM-Intermag conference, Washington DC USA, January 21, 2010 (Japanese).
[16] 佐藤哲也, 塚本新, 伊藤彰義, “GdFeCoフェリ磁性体薄膜における磁化動特性の組成比依存性”, 第33回日本磁気学会, 長崎, 2009年9月13日.
[15] 水澤謙太, 葉日宏, 谷川秀幸, 塚本新, 伊藤彰義, “自己集積シリカ粒子層上に急速昇温熱処理で作製したFePt微粒子”, 第33回日本磁気学会, 長崎, 2009年9月13日(Japanese).
[14] 大亀宗壽, 中本峻司, 塚本新, 伊藤彰義, “規則配列ナノ凹部を有するSiO2基板上に形成したFeCuPt微粒子”, 第33回日本磁気学会, 長崎, 2009年9月13日(Japanese).
[13] A. Tsukamoto, K. Kajiyama, S. Kawamura, T. Sato, A. Itoh, “Ultrafast magnetization dynamics near ferromagnetic compensation points in GdFeCo”, International Conference on Magnetism 2009, Karlsruhe Germany, July 30, 2009.
[12] K. Vahaplar, A. M. Kalashnikova, A. V. Kimel, A. Tsukamoto, A. Itoh, A. Kirilyuk, T. Rasing, “Ultrafast Visualization of All-Optical Magnetization Reversal in GdFeCo-films”, International Conference on Magnetism 2009, Karlsruhe Germany, July 30, 2009.
[11] A. Tsukamoto, K. Kajiyama, S. Kawamura, T. Sato, T. Shimizu, A. Itoh, “Measurements of Magnetic Damping Property in Ferrimagnetic GdFeCo Alloy”, MORIS2009, Awaji, Jun. 16, 2009.
[10] K. Vahaplar, A. M. Kalashnikova, A. V. Kimel, A. Tsukamoto, A. Itoh, A. Kirilyuk, Th. Rasing, “Ultrafast Visualization of All-Optical Magnetization Reversal in GdFeCo-Films”, MORIS2009, Awaji, Jun. 16, 2009.
[9] JihHung Yeh, A. Tsukamoto, A. Itoh, “High-Density Magnetic Recording Media on Self-Assembled Silica Particle Layer”, MORIS2009, Awaji, Jun. 16, 2009.
[8] A. Tsukamoto, A. Itoh, D. Stanciu, A. Kimel, F. Hansteen, A. Kirilyuk and T. Rasing, “Ultrafast thermo-magnetic writing across ferrimagnetic compensation points”, 53rd MMM Conference, Austin Texas USA, Oct. 10, 2008.
[7] 塚本新, 伊藤彰義, D.Stanciu, A.Kimel, F.Hansteen, A.Kirilyuk, T.Rasing, “GdFeCo薄膜における角運動量補償点利用超高速磁化反転”, 第32回日本磁気学会, 仙台, 2008年9月13日(Japanese).
[6] 吉野邦彦, 千野文寛, 塚本新, 伊藤彰義, “TbFeCo/FePt微粒子CGC媒体の磁壁抗磁力”, 第32回日本磁気学会, 仙台, 2008年9月13日(Japanese).
[5] 岡山健一, 大亀宗壽, 岩瀬慎平, 塚本新, 伊藤彰義, “Cr下地上に急速昇温熱処理を用いて形成したFeCuPt微粒子”, 第32回日本磁気学会, 仙台, 2008年9月13日(Japanese).
[4] H. Nakaigawa, K. Sato, Y. Moriyama, S. Suzuki, Y. Ashizawa, K. Nakaigawa, A. Tsukamoto, A. Itoh, “Fabrication of Transparent Slider with a Nano-Sized Plasmon Antenna for Thermally Assisted Magnetic Recording", International Symposium on Integration of MEMS and Intelligent Electronics, Tokyo, Aug. 23, 2008.
[3] A. Itoh, F. Chino, S. Iwase , Y. Sano, K. Okayama and A. Tsukamoto, “Domain structure in TbFeCo/FePt-grains composite film and Cu doping effect on Curie temperature of FePt grains”, INTERMAG2008, Madrid, Spain, May 4-8, 2008.
[2] C. D. Stanciu, F. Hansteen, A. V. Kimel, A. Kirilyuk, A. Tsukamoto, A. Itoh and Th. Rasing, “All optical femtosecond magnetic recording with circularly polarized light", 52th MMM, Tampa Florida, Nov. 7, 2007.
[1] T. Yoda, H. Tanikawa, F. Chino, A. Tsukamoto, A. Itoh, “Fabrication of isolated FeNiPt particles and LLG Simulations of TbFeCo/FeNiPt CGC-like Film", The 8th Perpendicular Magnetic Recording Conference (2007), Oct. 16, 2007.
invited speech
[17] A. Tsukamoto, "Precessional switching by ultrafast laser: Laser induced magnetization dynamics", Spintronics seminar, Institute of materials research, Tohoku University (2010/12/17).
[16] A. Itoh, and A. Tsukamoto, "RE-TM amorphous films for MO recording media and their future aspects", International workshop on Laser-induced magnetization dynamics in nanostructure, Stoos, Switzerland (2010/10/6).
[15] A. M. Kalashnikova, K. Vahaplar, A. V. Kimel, S. Kaneko, U. Nowak, D. Hinzke, R. W. Chantrell, A. Tsukamoto, A. Itoh, A. Kirilyuk, and Th. Rasing, "Ultrafast all-optical magnetization reversal in RE-TM alloys", International workshop on Laser-induced magnetization dynamics in nanostructure, Stoos, Switzerland (2010/10/7).
[14] 塚本新, "フェムト秒パルス・レーザによる超高速スピン制御・計測", 第71回応用物理学会学術講演会, 長崎大学, 長崎 (Japanese, 2010/9/15).
[13] A. Tsukamoto, T. Sato, S. Toriumi, A. Itoh, "Magnetization Dynamics induced by Femtosecond Laser Pulses in Ferrimagnetic GdFeCo", 第34回 日本磁気学会学術講演会, 筑波, 茨城 (Japanese, 2010/9/4).
[12] 塚本新, "超短パルス・レーザーを用いた磁化ダイナミクス計測と円偏光誘起磁化反転", SPring-8利用推進協議会 第4回先端磁性材料研究会「スピンダイナミクスと光誘起磁化過程 ~放射光計測の動向と将来への期待~」, 総評会館, 東京 (Japanese, 2010/8/5).
[11] 塚本新, "Fast manipulation of ferromagnetic magnetization in antiparallel spin sublattice system", 第36回 ナノマグネティックス専門研究会、IEEE Magnetics Society Japan Chapter Distinguished Lecturer講演会~アンチフェロスピン配列の理論と魅力と最前線~, 東工大蔵前会館, 東京 (Japanese, 2010/7/21).
[10] A. Tsukamoto, T. Sato, S. Toriumi, and A. Itoh, "Laser-induced demagnetization of RE-TM GdFeCo", ISAMMA 2010 (International Symposium on Advanced Magnetic Materials and Applications 2010), Sendai, Japan (2010/7/13).
[9] 塚本新, 佐藤哲也, 清水崇博, 鳥海紳悟, 伊藤彰義, “フェリ磁性GdFeCo合金の磁化ダンピング特性”, 日本磁気学会 第170回研究会「光と磁気のシナジー技術」~次世代ストレージ・光機能磁性デバイス実現のための新技術動向~, 東京, 2010年1月29日(Japanese).
[8] 伊藤彰義,塚本新,葉日宏, 大亀宗壽, 水澤謙太, “自己集積ナノシリカ球上のFePt”, 日本磁気学会 第170回研究会「光と磁気のシナジー技術」~次世代ストレージ・光機能磁性デバイス実現のための新技術動向~, 東京, 2010年1月29日(Japanese).
[7] A. Itoh, A. Tsukamoto, “Hybrid Magnetic Recording Media on FePt Grains and Self-Assembled Nano-Structured Layers”, MORIS2009, Awaji, Jun. 17, 2009.
[6] K. Yoshino, F. Chino, A. Tsukamoto, A. Itoh, “The Domain Structure with Few Pinning Sites in TbFeCo/FePt Composite Films”, MORIS2009, Awaji, Jun. 17, 2009.
[5] 塚本新, 伊藤彰義, D.Stanciu, A.Kimel, F.Hansteen, A.Kirilyuk, T.Rasing, “GdFeCoにおける超短パルス光誘起磁化反転”, 第25回スピンエレクトロニクス専門研究会,中央大学駿河台記念館,東京, 2009年3月18日(Japanese).
[4] 塚本新, 伊藤彰義, “超短パルスレーザ利用GdFeCo超高速磁化反転”, 日本磁気学会第165回研究会/第28回ナノマグネティックス専門研究会,中央大学駿河台記念館,東京, 2009年3月13日(Japanese).
[3] 塚本新, 伊藤彰義, D.Stanciu, A.Kimel, F.Hansteen, A.Kirilyuk, T.Rasing, “GdFeCo薄膜における角運動量補償点利用超高速磁化反転”, 第5回熱と磁気によるナノ領域スピン制御ストレージ技術調査専門委員会,日本大学,東京, 2008年10月21日(Japanese).
[2] 塚本新, 伊藤彰義, D.Stanciu, A.Kimel, F.Hansteen, A.Kirilyuk, T.Rasing, “超短パルス・レーザを用いた高速スピンダイナミクス計測と制御”, (独)日本学術振興会 薄膜第131委員会研究会,札幌,北海道, 2008年6月27日(Japanese).
[1] 塚本新, “超短パルス・レーザーを用いた磁化ダイナミクス計測と高速スピン制御”, NEDO特別講座「ナノフォトニクス総合的展開」「オープンセミナー」,東京大学,東京, 2008年5月29日(Japanese).
publications
[2] 塚本新(分担), “スピントロニクスの基礎と材料・応用技術の最前線”, シーエムシー出版, 2009年6月出版 (Japanese).
[1] 塚本新, 伊藤彰義, D.Stanciu, A.Kimel, F.Hansteen, A.Kirilyuk, T.Rasing, “GdFeCo 希土類遷移金属垂直磁化膜の高速磁化応答計測と制御”, 日本磁気学会誌まぐね, Vol. 3 (10), pp. 474–480 (2008) (Japanese)
patent
[1]
press
[2] “For faster magnetic switching—destroy and rebuild”,(American Physical Society “Physics –spotlighting exceptional research-”, Viewpoints, Riccardo Hertel, Physics 2, 73 (2009)).
[1] “Data storage -As quick as Light-”, (David Gevaux, Nature Photonics Vol. 1 No. 9 (2007)).



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