Development of ferromagnetic tunnel junctions with a ferroelectric barrier layer and the control of their spin-transport by electric field effects

• Project/Area Number: 26249037
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Electronic materials/Electric materials
• Research Institution: Tohoku University
• Principal Investigator: TSUNODA Masakiyo 東北大学, 工学研究科, 准教授 (80250702)
• Co-Investigator(Kenkyū-buntansha): 末益 崇 筑波大学, 数理物質科学研究科(系), 教授 (40282339) ; 白井 正文 東北大学, 電気通信研究所, 教授 (70221306) ; 古門 聡士 静岡大学, 工学研究科, 准教授 (50377719) ; 磯上 慎二 福島工業高等専門学校, 一般教科(物理科), 准教授 (10586853)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥31,850,000 (Direct Cost: ¥24,500,000、Indirect Cost: ¥7,350,000); Fiscal Year 2016: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000); Fiscal Year 2015: ¥10,660,000 (Direct Cost: ¥8,200,000、Indirect Cost: ¥2,460,000); Fiscal Year 2014: ¥12,480,000 (Direct Cost: ¥9,600,000、Indirect Cost: ¥2,880,000)
• Keywords: スピントロニクス / 磁性材料 / 磁気抵抗効果 / スピン分極 / 電界効果 / スピンエレクトロニクス / 磁性 / 先端磁性デバイス / 物性実験 / 物性理論 / 先端機能デバイス

Outline of Final Research Achievements

This study is aimed to control the spin-transport in Fe4N-based ferromagnetic tunnel junctions through the electric field effect by spontaneous polarization of a ferroelectric tunnel barrier. Various kinds of anti-perovskite-type transition-metal nitride thin films were successfully synthesized and their magnetic and magneto-transport properties were examined. The spin-polarized transport theory was newly constructed taking into account the spin-orbit interaction and crystal field effects, and successfully evaluated the spin-polarization of conduction electrons in ferromagnets with its sign through the anisotropic magnetoresistance effects. Epitaxial growth technique of thin films was developed for complex oxides as perovskite-type ferroelectrics. Electric field effects of ferromagnetic tunnel junctions with a ferroelectric barrier layer were investigated by the first-principles calculation.

Research Products

• [Journal Article] Magnetoresistance behaviors of conducting filaments in resistive-switching NiO with different resistance states (2017)
  • Author(s): Diyang Zhao, Shuang Qiao, Yuxiang Luo, Aitian Chen, Pengfei Zhang, Ping Zheng, Zhong Sun, Minghua Guo, Fu-kuo Chiang, Jian Wu, Jian-Lin Luo, Jianqi Li, Satoshi Kokado, Yayu Wang, and Yonggang Zhao
  • Journal Title: ACS Applied Materials & Interfaces Volume: 9 Issue: 12 Pages: 10835-10846
  • DOI: 10.1021/acsami.6b16458
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Negative anisotropic magnetoresistance resulting from minority spin transport in NixFe4-xN (x=1 and 3) epitaxial films (2017)
  • Author(s): F. Takata, K. Kabara, K. Ito, M. Tsunoda, T. Suemasu
  • Journal Title: Journal of Applied Physics Volume: 121 Issue: 2
  • DOI: 10.1063/1.4974002
  • NAID: 120007135054
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 逆ペロブスカイト型遷移金属窒化物薄膜の電流磁気効果 (2016)
  • Author(s): 角田匡清, 鹿原和樹, 古門聡士
  • Journal Title: まぐね Volume: 11 Pages: 125-132
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Spin polarization ratios of resistivity and density of states estimated from anisotropic magnetoresistance ratio for nearly half-metallic ferromagnets (2016)
  • Author(s): Satoshi Kokado, Yuya Sakuraba, and Masakiyo Tsunoda
  • Journal Title: Japanese Journal of Applied Physics Volume: 55 Issue: 10 Pages: 108004-108004
  • DOI: 10.7567/jjap.55.108004
  • NAID: 210000147149
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Epitaxial growth and magnetic properties of NixFe4-xN (x=0, 1, 3, and 4) films on SrTiO3(001) substrates (2016)
  • Author(s): F. Takata, K. Ito, S. Higashikozono, T. Gushi, K. Toko, T. Suemasu
  • Journal Title: Journal of Applied Physics Volume: 120 Issue: 8
  • DOI: 10.1063/1.4961734
  • NAID: 120007129363
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Electrical detection of magnetic domain wall in Fe4N nanostrip by negative anisotropic magnetoresistance effect (2016)
  • Author(s): T. Gushi, K. Ito, S. Higashikozono, F. Takata, H. Oosato, Y. Sugimoto, K. Toko, S. Honda, T. Suemasu
  • Journal Title: Journal of Applied Physics Volume: 120 Issue: 11 Pages: 113903-113903
  • DOI: 10.1063/1.4962721
  • NAID: 120007129353
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Growth and magnetic properties of epitaxial Fe4N films on insulators possessing lattice spacing close to Si(001) plane (2016)
  • Author(s): K. Ito, S. Higashikozono, F. Takata, T. Gushi, K. Toko, T. Suemasu
  • Journal Title: Journal of Crystal Growth Volume: 455 Pages: 66-70
  • DOI: 10.1016/j.jcrysgro.2016.09.036
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Anisotropic FMR Linewidths in Epitaxially Grown Si-Doped <i>A</i>2-Fe Thin Films (2016)
  • Author(s): S. Isogami, T. Kawai, and M. Futamoto
  • Journal Title: MATERIALS TRANSACTIONS Volume: 57 Issue: 9 Pages: 1489-1493
  • DOI: 10.2320/matertrans.M2016106
  • NAID: 130005289915
  • ISSN: 1345-9678, 1347-5320
  • Peer Reviewed
• [Journal Article] Magneto-transport properties of pseudo-single-crystal Mn4N thin films (2016)
  • Author(s): Kazuki Kabara, Masakiyo Tsunoda, and Satoshi Kokado
  • Journal Title: AIP Advances Volume: 7 Issue: 5
  • DOI: 10.1063/1.4974065
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Enhanced inverse spin-Hall voltage in (001) oriented Fe4N/Pt polycrystalline films without contribution of planar-Hall effect (2016)
  • Author(s): S. Isogami and M. Tsunoda
  • Journal Title: Japanese Journal of Applied Physics Volume: 55 Issue: 4 Pages: 043001-043001
  • DOI: 10.7567/jjap.55.043001
  • NAID: 210000146237
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Anomalous Hall effects in pseudo-single-crystal gamma'-Fe4N thin films (2016)
  • Author(s): Kazuki Kabara, Masakiyo Tsunoda, and Satoshi Kokado
  • Journal Title: AIP Advances Volume: 6 Issue: 5
  • DOI: 10.1063/1.4942550
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Transverse anisotropic magnetoresistance effects in pseudo-single-crystal gamma'-Fe4N thin films (2016)
  • Author(s): Kazuki Kabara, Masakiyo Tsunoda, and Satoshi Kokado
  • Journal Title: AIP Advances Volume: 6 Issue: 5
  • DOI: 10.1063/1.4943923
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Perpendicular magnetic anisotropy in CoxMn4－xN (x = 0 and 0.2) epitaxial films and possibility of tetragonal Mn4N phase (2016)
  • Author(s): Keita Ito, Yoko Yasutomi, Kazuki Kabara, Toshiki Gushi, Soma Higashikozono, Kaoru Toko, Masakiyo Tsunoda, and Takashi Suemasu
  • Journal Title: AIP Advances Volume: 6 Issue: 5
  • DOI: 10.1063/1.4942548
  • NAID: 120007135362
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Twofold and Fourfold Symmetric Anisotropic Magnetoresistance Effect in A Model with Crystal Field (2015)
  • Author(s): Satoshi Kokado and Masakiyo Tsunoda
  • Journal Title: J. Phys. Soc. Jpn. Volume: 84 Issue: 9
  • DOI: 10.7566/jpsj.84.094710
  • NAID: 120005649704
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Perpendicular magnetic anisotropy of Mn4N films fabricated by reactive sputtering method (2015)
  • Author(s): K. Kabara and M. Tsunoda
  • Journal Title: Journal of Applied Physics Volume: 117 Issue: 17
  • DOI: 10.1063/1.4913730
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Mossbauer study on epitaxial CoxFe4-xN films grown by molecular beam epitaxy (2015)
  • Author(s): K. Ito, T. Sanai, Y. Yasutomi, T. Gushi, K. Toko, H. Yanagihara, M. Tsunoda, E. Kita, and T. Suemasu
  • Journal Title: Journal of Applied Physics Volume: 117 Issue: 17
  • DOI: 10.1063/1.4914342
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Fabrication of MgAl2O4 tunnel barrier by radio frequency-sputtering method and magnetoresistance effect through it with Fe or Fe4N ferromagnetic electrode (2015)
  • Author(s): M. Tsunoda, R. Chiba, and K. Kabara
  • Journal Title: Journal of Applied Physics Volume: 117 Issue: 17
  • DOI: 10.1063/1.4906762
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Fabrication of L-shaped Fe4N ferromagnetic narrow wires and position control of magnetic domain wall with magnetic field (2015)
  • Author(s): T. Gushi, K. Ito, S. Honda, Y. Yasutomi, K. Toko, H. Oosato, Y. Sugimoto, K. Asakawa, N. Ota, and T. Suemasu
  • Journal Title: Japanese Journal of Applied Physics Volume: 54 Issue: 2 Pages: 028003-028003
  • DOI: 10.7567/jjap.54.028003
  • Peer Reviewed
• [Journal Article] Annealing effects on nitrogen site ordering and anisotropic magnetoresistance in pseudo-single-crystal gamma'-Fe4N films (2014)
  • Author(s): Kazuki Kabara, Masakiyo Tsunoda, Satoshi Kokado
  • Journal Title: Applied Physics Express Volume: 7 Issue: 6 Pages: 063003-063003
  • DOI: 10.7567/apex.7.063003
  • Peer Reviewed
• [Journal Article] Dependence of Magnetic Damping on Temperature and Crystal Orientation in Epitaxial Fe4N Thin Films (2014)
  • Author(s): S. Isogami, M. Tsunoda, M. Oogane, A. Sakuma, and M. Takahashi
  • Journal Title: Journal of Magnetics Society of Japan Volume: 38 Pages: 162-168
  • Peer Reviewed
• [Journal Article] Sign of the spin-polarization in cobalt-iron nitride films determined by the anisotropic magnetoresistance effect (2014)
  • Author(s): K. Ito, K. Kabara, T. Sanai, K. Toko, Y. Imai, M. Tsunoda, and T. Suemasu
  • Journal Title: Journal of Applied Physics Volume: 116 Issue: 5
  • DOI: 10.1063/1.4892179
  • Peer Reviewed
• [Journal Article] Quantitative analysis of anisotropic magnetoresistance in Co2MnZ and Co2FeZ epitaxial thin films (2014)
  • Author(s): Y. Sakuraba, S. Kokado, Y. Hirayama, T. Furubayashi, H. Sukegawa, S. Li, Y. K. Takahashi, and K. Hono
  • Journal Title: Appl. Phys. Lett. Volume: 104 Issue: 17
  • DOI: 10.1063/1.4874851
  • Peer Reviewed
• [Presentation] Relational expression between spin polarization ratio and anisotropic magnetoresistance ratio for nearly half-metallic ferromagnets (2017)
  • Author(s): Satoshi Kokado, Yuya Sakuraba, Masakiyo Tsunoda
  • Organizer: 81th DPG (Deutsche Physikalische Gesellschaft) Spring Meeting
  • Place of Presentation: ドレスデン工科大学（ドイツ）
  • Year and Date: 2017-03-19
  • Int'l Joint Research
• [Presentation] ハーフメタルに近い強磁性体のスピン分極率と異方性磁気抵抗比の間の関係式 (2017)
  • Author(s): 古門聡士, 桜庭裕弥, 角田匡清
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学（大阪府・豊中市）
  • Year and Date: 2017-03-17
• [Presentation] 異方性磁気抵抗効果を用いたCo2FeGa0.5Ge0.5薄膜のバルクスピン分極率解析 (2017)
  • Author(s): 桜庭裕弥, 中谷友也, Li Songtian, 古林孝夫, 三浦良雄, 宝野和博, 古門聡士, 田尻寛男
  • Organizer: 第64回応用物理学会春季学術講演会
  • Place of Presentation: パシフィコ横浜（神奈川県・横浜市）
  • Year and Date: 2017-03-14
• [Presentation] CoFe3N/BaTiO3接合界面における電気分極反転に伴う巨大な磁気モーメント変化 (2017)
  • Author(s): 隈田 壮, 辻川 雅人，白井 正文
  • Organizer: 第64回応用物理学会春季学術講演会
  • Place of Presentation: パシフィコ横浜（神奈川県・横浜市）
  • Year and Date: 2017-03-14
• [Presentation] 逆ペロブスカイト型強磁性窒化物MnxFe4-xN 薄膜の磁気特性 (2017)
  • Author(s): 安西 聡仁, 具志 俊希, 東小薗 創真, 高田 郁弥, 都甲 薫, 末益 崇
  • Organizer: 第64回応用物理学会春季学術講演会
  • Place of Presentation: パシフィコ横浜（神奈川県・横浜市）
  • Year and Date: 2017-03-14
• [Presentation] 逆ペロブスカイト型Mn4N擬単結晶薄膜の電流磁気効果 (2017)
  • Author(s): 鹿原和樹, 角田匡清, 古門聡士
  • Organizer: 強的秩序とその操作に関する第4回研究会
  • Place of Presentation: 東京大学（東京都・文京区）
• [Presentation] CoFe3N/BaTiO3/CoFe3N ヘテロ構造における巨大な電気磁気効果 (2017)
  • Author(s): 隈田 壮, 辻川 雅人，白井 正文
  • Organizer: 強的秩序とその操作に関する第4回研究会
  • Place of Presentation: 東京大学（東京都・文京区）
• [Presentation] Intuitive Explanation of Anisotropic Magnetoresistance (AMR) Effect and Necessary Condition for Half-Metallic Ferromagnet “Negative AMR" (2017)
  • Author(s): Satoshi Kokado and Masakiyo Tsunoda
  • Organizer: Seminar at School of Materials Science and Engineering
  • Place of Presentation: 桂林電子科技大学（中国）
  • Int'l Joint Research / Invited
• [Presentation] Intuitive Explanation of Anisotropic Magnetoresistance (AMR) Effect and Necessary Condition for Half-Metallic Ferromagnet “Negative AMR" (2017)
  • Author(s): Satoshi Kokado and Masakiyo Tsunoda
  • Organizer: Seminar at Department of Physics
  • Place of Presentation: 精華大学（中国）
  • Int'l Joint Research / Invited
• [Presentation] 逆ペロブスカイト型遷移金属窒化物薄膜の磁気伝導特性 (2017)
  • Author(s): 角田匡清, 鹿原和樹, 古門聡士
  • Organizer: 第２回磁性材料・磁性薄膜研究会
  • Place of Presentation: 名古屋工業大学（愛知県・名古屋市）
  • Invited
• [Presentation] Theoretical Study on Anisotropic Magnetoresistance Effects in Ferromagnets (2016)
  • Author(s): Satoshi Kokado and Masakiyo Tsunoda
  • Organizer: International Symposium on Innovative Materials and Physics
  • Place of Presentation: ウォロンゴン大学（オーストラリア）
  • Year and Date: 2016-11-20
  • Int'l Joint Research / Invited
• [Presentation] Magneto-transport properties of pseudo-single-crystal Mn4N thin films (2016)
  • Author(s): Kazuki Kabara, Masakiyo Tsunoda, and Satoshi Kokado
  • Organizer: 61st Annual Conference on Magnetism and Magnetic Materials
  • Place of Presentation: ニューオリンズ（アメリカ）
  • Year and Date: 2016-10-31
  • Int'l Joint Research
• [Presentation] Design of changeable logic devices using hybrid magnetic tunnel junctions with normal and inverse magnetoresistive effect (2016)
  • Author(s): S. Isogami
  • Organizer: 61st Annual Conference on Magnetism and Magnetic Materials
  • Place of Presentation: ニューオリンズ（アメリカ）
  • Year and Date: 2016-10-31
  • Int'l Joint Research
• [Presentation] Dependence of spin dynamics on nitrogen site ordering in Fe4N thin films (2016)
  • Author(s): S. Isogami
  • Organizer: 61st Annual Conference on Magnetism and Magnetic Materials
  • Place of Presentation: ニューオリンズ（アメリカ）
  • Year and Date: 2016-10-31
  • Int'l Joint Research
• [Presentation] Minority spin transport in epitaxially grown nickel-iron nitride films (2016)
  • Author(s): F.Takata, K. Ito, K. Kabara, S. Higashikozono, T. Gushi, K. Toko, M. Tsunoda, and T. Suemasu
  • Organizer: 2016 International Conference on Solid State Devices and Materials
  • Place of Presentation: つくば国際会議場（茨城県・つくば市）
  • Year and Date: 2016-09-26
  • Int'l Joint Research
• [Presentation] NixFe4-xN(x = 1, 3)薄膜の負の異方性磁気抵抗効果 (2016)
  • Author(s): 高田郁弥, 伊藤啓太, 鹿原和樹, 東小薗創真, 具志俊希, 都甲薫, 角田匡清, 末益崇
  • Organizer: 第77回応用物理学会秋季学術講演会
  • Place of Presentation: 朱鷺メッセ（新潟県・新潟市）
  • Year and Date: 2016-09-13
• [Presentation] MBE法で作製したα'-Fe16-xMnxN2(x=0,1,2)薄膜の磁気特性 (2016)
  • Author(s): 東小薗 創真, 伊藤 啓太, 具志 俊希, 高田 郁弥, 都甲 薫, 末益 崇
  • Organizer: 第77回応用物理学会秋季学術講演会
  • Place of Presentation: 朱鷺メッセ（新潟県・新潟市）
  • Year and Date: 2016-09-13
• [Presentation] エピタキシャルNixFe4-xN(x = 0, 1, 3, 4)薄膜の磁気物性の評価 (2016)
  • Author(s): 伊藤 啓太, 鹿原 和樹, 高田 郁弥, 東小薗 創真, 具志 俊希, 都甲 薫, 角田 匡清, 末益 崇
  • Organizer: 第40回日本磁気学会学術講演会
  • Place of Presentation: 金沢大学（石川県・金沢市）
  • Year and Date: 2016-09-05
• [Presentation] 擬単結晶Fe4N薄膜における異常ネルンスト効果の結晶方位依存性 (2016)
  • Author(s): 磯上慎二，水口将輝，高梨弘毅
  • Organizer: 第40回日本磁気学会学術講演会
  • Place of Presentation: 金沢大学（石川県・金沢市）
  • Year and Date: 2016-09-05
• [Presentation] (Fe, Co)4N/BaTiO3界面における電気磁気効果の第一原理計算 (2016)
  • Author(s): 辻川 雅人，隈田 壮，白井 正文
  • Organizer: 第３回 誘電体・磁性体 若手夏の学校
  • Place of Presentation: 蔵王温泉（山形県・山形市）
  • Year and Date: 2016-08-26
• [Presentation] Low temperature anomalies of galvanomagnetic effects in γ’-Fe4N thin films (2016)
  • Author(s): Masakiyo Tsunoda, Kazuki Kabara, and Satoshi Kokado
  • Organizer: The 8th Joint European Magnetic Symposia
  • Place of Presentation: グラスゴー（イギリス）
  • Year and Date: 2016-08-22
  • Int'l Joint Research
• [Presentation] Highly oriented epitaxial (α"+α')-Fe16N2 films on α-Fe(001) buffered MgAl2O4(001) substrates and their magnetizations (2016)
  • Author(s): S. Higashikozono, K. Ito, F. Takata, T. Gushi, K. Toko, and T.Suemasu
  • Organizer: The 18th International Conference on Crystal Growth and Epitaxy
  • Place of Presentation: 名古屋国際センター（愛知県・名古屋市）
  • Year and Date: 2016-08-07
  • Int'l Joint Research
• [Presentation] First-principles study on the electronic and magnetic properties of BiFeO3 and Bi(Fe,Co)O3 (2016)
  • Author(s): M. Tsujikawa, Y. Matsuzawa, M. Shirai
  • Organizer: 2016 Japan & France joint workshop
  • Place of Presentation: パリ第３大学（フランス）
  • Year and Date: 2016-05-19
  • Int'l Joint Research
• [Presentation] Anisotropic Magnetoresistance Effects in Fe, Co, Ni, Fe4N, and Half-Metallic Ferromagnet: Systematic Analysis and Intuitive Explanation (2016)
  • Author(s): Satoshi Kokado, Masakiyo Tsunoda
  • Organizer: 2016 MRS (Materials Research Society) Spring Meeting & Exhibit
  • Place of Presentation: Phoenix (USA)
  • Year and Date: 2016-03-28
  • Int'l Joint Research
• [Presentation] 擬単結晶Fe4N薄膜における異常ネルンスト効果の結晶方位依存性 (2016)
  • Author(s): 磯上慎二，水口将輝，高梨弘毅
  • Organizer: 第63回応用物理学会春季学術講演会
  • Place of Presentation: 東京工業大学（東京都・目黒区）
  • Year and Date: 2016-03-19
• [Presentation] MBE法による強磁性窒化物NixFe4-xN薄膜のエピタキシャル成長 (2016)
  • Author(s): 高田 郁弥、伊藤 啓太、具志 俊希、東小薗 創真、都甲 薫、末益 崇
  • Organizer: 第63回応用物理学会春季学術講演会
  • Place of Presentation: 東京工業大学（東京都・目黒区）
  • Year and Date: 2016-03-19
• [Presentation] 異方性磁気抵抗効果を利用したFe4N 細線における磁壁の電流検出 (2016)
  • Author(s): 具志 俊希、伊藤 啓太、東小薗 創真、都甲 薫、大里 啓孝、杉本 喜正、本多 周太、末益 崇
  • Organizer: 第63回応用物理学会春季学術講演会
  • Place of Presentation: 東京工業大学（東京都・目黒区）
  • Year and Date: 2016-03-19
• [Presentation] 垂直磁気異方性をもつ正方晶フェリ磁性Mn4N薄膜の磁気構造 (2016)
  • Author(s): 伊藤 啓太、具志 俊希、東小薗 創真、都甲 薫、白井 正文、角田 匡清、末益 崇
  • Organizer: 第63回応用物理学会春季学術講演会
  • Place of Presentation: 東京工業大学（東京都・目黒区）
  • Year and Date: 2016-03-19
• [Presentation] Theoretical Study on Twofold and Fourfold Symmetric Anisotropic Magnetoresistance Effect (2016)
  • Author(s): Satoshi Kokado, Masakiyo Tsunoda
  • Organizer: APS (American Physical Society) March Meeting 2016
  • Place of Presentation: Baltimore (USA)
  • Year and Date: 2016-03-14
  • Int'l Joint Research
• [Presentation] Twofold and Fourfold Symmetric Anisotropic Magnetoresistance Effect in a Model with Crystal Field (2016)
  • Author(s): Satoshi Kokado, Masakiyo Tsunoda
  • Organizer: 80th Annual Meeting of the DPG and Spring Meeting
  • Place of Presentation: Regensburg (Germany)
  • Year and Date: 2016-03-06
  • Int'l Joint Research
• [Presentation] Anomalous Hall effect in pseudo-single-crystal γ'-Fe4N thin films (2016)
  • Author(s): Kazuki Kabara, Masakiyo Tsunoda, Satoshi Kokado
  • Organizer: 13th Joint MMM-Intermag Conference
  • Place of Presentation: San Diego (USA)
  • Year and Date: 2016-01-11
  • Int'l Joint Research
• [Presentation] Transverse anisotropic magnetoresistance effects in pseudo-single-crystal γ'-Fe4N thin films (2016)
  • Author(s): Kazuki Kabara, Masakiyo Tsunoda, Satoshi Kokado
  • Organizer: 13th Joint MMM-Intermag Conference
  • Place of Presentation: San Diego (USA)
  • Year and Date: 2016-01-11
  • Int'l Joint Research
• [Presentation] Enhanced spin-Hall voltage in Fe4N/Pt bilayer films (2016)
  • Author(s): S. Isogami and M. Tsunoda
  • Organizer: 13th Joint MMM-Intermag Conference
  • Place of Presentation: San Diego (USA)
  • Year and Date: 2016-01-11
  • Int'l Joint Research
• [Presentation] Perpendicular magnetic anisotropy of CoxMn4-xN (x = 0 and 0.2) epitaxial films on SrTiO3(001) substrates (2016)
  • Author(s): K. Ito, Y. Yasutomi, K. Kabara, T. Gushi, S. Higashikozono, K. Toko, M. Tsunoda, and T. Suemasu
  • Organizer: 13th Joint MMM-Intermag Conference
  • Place of Presentation: San Diego (USA)
  • Year and Date: 2016-01-11
  • Int'l Joint Research
• [Presentation] Fe4N/BaTiO3/Fe4Nヘテロ構造における電気磁気およびスピン依存伝導特性 (2016)
  • Author(s): 辻川 雅人，隈田 壮，白井 正文
  • Organizer: 応用物理学会新領域研究「強的秩序とその操作に関わる研究グループ第１回研究会」
  • Place of Presentation: 東京工業大学（東京都・目黒区）
  • Year and Date: 2016-01-04
• [Presentation] 強磁性体の異方性磁気抵抗効果：波動関数を用いた直感的説明 (2016)
  • Author(s): 古門聡士, 角田匡清
  • Organizer: 応用物理学会新領域研究「強的秩序とその操作に関わる研究グループ第１回研究会」
  • Place of Presentation: 東京工業大学（東京都・目黒区）
  • Year and Date: 2016-01-04
• [Presentation] Anisotropic Magnetoresistance Effects in Fe, Co, Ni, Fe4N, and Half-Metallic Ferromagnet: Systematic Analysis and Intuitive Explanation (2015)
  • Author(s): S. Kokado, T. Ito, R. Wada, M. Tsunoda
  • Organizer: 13th RIEC International Workshop on Spintronics
  • Place of Presentation: 東北大学（宮城県・仙台市）
  • Year and Date: 2015-11-18
  • Int'l Joint Research
• [Presentation] Fe4N擬単結晶薄膜の異方性磁気抵抗効果と異常ホール効果 (2015)
  • Author(s): 角田匡清, 鹿原和樹, 古門聡士
  • Organizer: 電子情報通信学会磁気記録・情報ストレージ研究会
  • Place of Presentation: 大阪大学（大阪府・吹田市）
  • Year and Date: 2015-10-22
  • Invited
• [Presentation] Fe4N 細線における磁壁物性の細線形状依存性の評価 (2015)
  • Author(s): 具志 俊希, 伊藤 啓太, 東小薗 創真, 都甲薫, 大里 啓孝, 杉本 喜正, 本多 周太, 末益 崇
  • Organizer: 第76回応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場（愛知県・名古屋市）
  • Year and Date: 2015-09-13
• [Presentation] α-Fe 下地を用いたMgAl2O4 基板上へのα '-Fe- N のエピタキシャル成長 (2015)
  • Author(s): 東小薗 創真, 伊藤 啓太, 具志 俊希, 都甲 薫, 末益 崇
  • Organizer: 第76回応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場（愛知県・名古屋市）
  • Year and Date: 2015-09-13
• [Presentation] 擬単結晶γ’-Fe4N薄膜の異常ホール効果 (2015)
  • Author(s): 鹿原和樹, 角田匡清, 古門聡士
  • Organizer: 第39回日本磁気学会学術講演会
  • Place of Presentation: 名古屋大学（愛知県・名古屋市）
  • Year and Date: 2015-09-08
• [Presentation] Mn4N薄膜の異方性磁気抵抗効果と異常ホール効果 (2015)
  • Author(s): 鹿原和樹, 角田匡清, 古門聡士
  • Organizer: 第39回日本磁気学会学術講演会
  • Place of Presentation: 名古屋大学（愛知県・名古屋市）
  • Year and Date: 2015-09-08
• [Presentation] Fe4Nエピタキシャル薄膜の窒素原子占有度の評価 (2015)
  • Author(s): 伊藤 啓太, 具志 俊希, 東小薗 創真, 竹田 幸治, 斎藤 祐児, 都甲 薫, 柳原 英人, 角田 匡清, 小口 多美夫, 木村 昭夫, 喜多 英治, 末益 崇
  • Organizer: 第39回日本磁気学会学術講演会
  • Place of Presentation: 名古屋大学（愛知県・名古屋市）
  • Year and Date: 2015-09-08
• [Presentation] スピネル障壁層を用いた強磁性トンネル接合膜の作製 (2015)
  • Author(s): 佐々木麻季，角田匡清
  • Organizer: 第39回日本磁気学会学術講演会
  • Place of Presentation: 名古屋大学（愛知県・名古屋市）
  • Year and Date: 2015-09-08
• [Presentation] (Al,Ti)-N障壁層を用いた強磁性トンネル接合膜の作製 (2015)
  • Author(s): 酒井康貴，小林宗平，角田匡清
  • Organizer: 第39回日本磁気学会学術講演会
  • Place of Presentation: 名古屋大学（愛知県・名古屋市）
  • Year and Date: 2015-09-08
• [Presentation] Observation and control of magnetic domain structure in Fe4N ferromagnetic nanowire (2015)
  • Author(s): T. Gushi, K. Ito, S. Honda, Y. Yasutomi, S. Higashikozono, K. Toko, H. Oosato, Y. Sugimoto, K. Asakawa, N. Ota, and T. Suemasu
  • Organizer: ASCO-NANOMAT (Asian School-Conference on Physics and Technology of Nanostructured Materials) 2015
  • Place of Presentation: Vladivostok (Russia)
  • Year and Date: 2015-08-19
  • Int'l Joint Research
• [Presentation] Fe4N薄膜の異方性磁気抵抗効果 (2015)
  • Author(s): 角田匡清, 古門聡士
  • Organizer: みちのく磁性談話会
  • Place of Presentation: 宮城蔵王ロイヤルホテル（宮城県・蔵王町）
  • Year and Date: 2015-06-06
  • Invited
• [Presentation] Control of domain wall position in L-shaped Fe4N negatively spin polarized ferromagnetic nanowire (2015)
  • Author(s): Toshiki Gushi, Keita Ito, Syuta Honda, Yoko Yasutomi, Soma Higashikozono, Kaoru Toko, Hirotaka Oosato, Yoshimasa Sugimoto, Kiyoshi Asakawa, Norio Ota, and Takashi Suemasu
  • Organizer: IEEE International Magnetics Conference 2015
  • Place of Presentation: Beijing (China)
  • Year and Date: 2015-05-11
  • Int'l Joint Research
• [Presentation] Intuitive Explanation of Anisotropic Magnetoresistance (AMR) Effect and Necessary Condition for Half-Metallic Ferromagnet ``Negative AMR'' (2015)
  • Author(s): Satoshi Kokado, Yuta Kitagawa, Takuya Ito, Masakiyo Tsunoda
  • Organizer: Deutsche Physikalische Gesellschaft (DPG) Spring Meeting
  • Place of Presentation: ベルリン（独国）
  • Year and Date: 2015-03-15 – 2015-03-20
• [Presentation] 負のスピン分極率を有するFe4N強磁性細線の磁壁形成位置の制御 (2015)
  • Author(s): 具志 俊希、伊藤 啓太、安富 陽子、東小薗 創真、都甲 薫、大里 啓孝、杉本 喜正、浅川 潔、太田 憲雄、本多 周太、末益 崇
  • Organizer: 応用物理学会
  • Place of Presentation: 東海大学（神奈川県厚木市）
  • Year and Date: 2015-03-11 – 2015-03-14
• [Presentation] MBE法によるα"-Fe16N2薄膜のエピタキシャル成長 (2015)
  • Author(s): 東小薗 創真、伊藤 啓太、安富 陽子、具志 俊希、都甲 薫、末益 崇
  • Organizer: 応用物理学会
  • Place of Presentation: 東海大学（神奈川県厚木市）
  • Year and Date: 2015-03-11 – 2015-03-14
• [Presentation] CoxMn4-xN エピタキシャル薄膜の飽和磁化と垂直磁気異方性の評価 (2015)
  • Author(s): 伊藤 啓太、安富 陽子、鹿原 和樹、具志 俊希、東小薗 創真、都甲 薫、角田 匡清、末益 崇
  • Organizer: 応用物理学会
  • Place of Presentation: 東海大学（神奈川県厚木市）
  • Year and Date: 2015-03-11 – 2015-03-14
• [Presentation] Perpendicular magnetic anisotropy of Mn4N films fabricated by reactive sputtering method (2014)
  • Author(s): K. Kabara and M. Tsunoda
  • Organizer: 59th Annual Magnetism and Magnetic Materials (MMM) Conference
  • Place of Presentation: ホノルル（米国ハワイ州）
  • Year and Date: 2014-11-03 – 2014-11-07
• [Presentation] Fabrication of spinel barrier by rf-sputtering and tunnel magnetoresistance through it with Fe or Fe4N electrode (2014)
  • Author(s): M. Tsunoda and R. Chiba
  • Organizer: 59th Annual Magnetism and Magnetic Materials (MMM) Conference
  • Place of Presentation: ホノルル（米国ハワイ州）
  • Year and Date: 2014-11-03 – 2014-11-07
• [Presentation] Mossbauer study on epitaxial CoxFe4-xN films grown by molecular beam epitaxy (2014)
  • Author(s): K. Ito, T. Sanai, Y. Yasutomi, T. Gushi, K. Toko, H. Yanagihara, M. Tsunoda, E. Kita and T. Suemasu
  • Organizer: 59th Annual Magnetism and Magnetic Materials (MMM) Conference
  • Place of Presentation: ホノルル（米国ハワイ州）
  • Year and Date: 2014-11-03 – 2014-11-07
• [Presentation] Novel approach to investigate spin-polarization in half-metallic Heusler compounds via anisotropic magnetoresistance effect (2014)
  • Author(s): Y. Sakuraba, S. Kokado, Y. Hirayama, T. Furubayashi, H. Sukegawa, S. Li, Y. K. Takahashi, and K. Hono
  • Organizer: 59th Annual Magnetism and Magnetic Materials (MMM) Conference
  • Place of Presentation: ホノルル（米国ハワイ州）
  • Year and Date: 2014-11-03 – 2014-11-07
  • Invited
• [Presentation] CoxFe4-xN(x = 0, 1, 3) エピタキシャル膜のメスバウアー測定 (2014)
  • Author(s): 伊藤啓太，佐内辰徳，安富陽子，具志俊希，都甲 薫，柳原英人，角田匡清，喜多英治，末益 崇
  • Organizer: 応用物理学会
  • Place of Presentation: 北海道大学（北海道札幌市）
  • Year and Date: 2014-09-17 – 2014-09-20
• [Presentation] くの字型及び円弧状Fe4N 強磁性細線の作製と磁区観察 (2014)
  • Author(s): 具志俊希，伊藤啓太，安富陽子，都甲 薫，大里啓孝，杉本喜正, 浅川 潔，太田憲雄，本多周太，末益 崇
  • Organizer: 応用物理学会
  • Place of Presentation: 北海道大学（北海道札幌市）
  • Year and Date: 2014-09-17 – 2014-09-20
• [Presentation] CoxMn4-xN 薄膜における磁気特性のCo/Mn 比依存性 (2014)
  • Author(s): 安富陽子，伊藤啓太，具志俊希，都甲 薫，末益 崇
  • Organizer: 応用物理学会
  • Place of Presentation: 北海道大学（北海道札幌市）
  • Year and Date: 2014-09-17 – 2014-09-20
• [Presentation] 異方性磁気抵抗(AMR) 効果の直感的説明とハーフメタリック強磁性体の必要 条件「負のAMR」 (2014)
  • Author(s): 古門聡士，北川佑太，角田匡清
  • Organizer: 応用物理学会
  • Place of Presentation: 北海道大学（北海道札幌市）
  • Year and Date: 2014-09-17 – 2014-09-20
• [Presentation] 反応性スパッタ法で作製したMn4N薄膜の磁気特性 ～窒素量依存性～ (2014)
  • Author(s): 鹿原和樹，角田匡清
  • Organizer: 日本磁気学会
  • Place of Presentation: 慶應義塾大学（神奈川県横浜市）
  • Year and Date: 2014-09-02 – 2014-09-05
• [Presentation] γ'-Fe4N擬単結晶薄膜の異方性磁気抵抗効果～規則度依存性～ (2014)
  • Author(s): 鹿原和樹，角田匡清，古門聡士
  • Organizer: 日本磁気学会
  • Place of Presentation: 慶應義塾大学（神奈川県横浜市）
  • Year and Date: 2014-09-02 – 2014-09-05
• [Presentation] ドライアイス処理によるリフトオフを用いた磁気抵抗素子の加工 (2014)
  • Author(s): 三宅耕作，角田匡清，佐橋政司
  • Organizer: 日本磁気学会
  • Place of Presentation: 慶應義塾大学（神奈川県横浜市）
  • Year and Date: 2014-09-02 – 2014-09-05
• [Presentation] (Fe,Co)4N薄膜を用いた強磁性トンネル接合の作製 (2014)
  • Author(s): 鹿原和樹，角田匡清
  • Organizer: 日本磁気学会
  • Place of Presentation: 慶應義塾大学（神奈川県横浜市）
  • Year and Date: 2014-09-02 – 2014-09-05
• [Presentation] ハーフメタルホイスラー合金薄膜における異方性磁気抵抗効果の 定量解析 (2014)
  • Author(s): 桜庭裕弥, 古門聡士, 平山悠介, 古林孝夫, 介川裕章, 李松田, 高橋由紀子, 宝野和博
  • Organizer: 日本磁気学会
  • Place of Presentation: 慶應義塾大学（神奈川県横浜市）
  • Year and Date: 2014-09-02 – 2014-09-05
• [Presentation] Generation of spin current by spin pumping technique from ferromagnetic materials with negative spin polarization (2014)
  • Author(s): Shinji Isogami, Masakiyo Tsunoda, Mikihiko Oogane, Kazuki Kabara, and Migaku Takahashi
  • Organizer: IEEE International Magnetics Conference
  • Place of Presentation: ドレスデン（独国）
  • Year and Date: 2014-05-04 – 2014-05-08