2010 Fiscal Year Final Research Report
Spin wave excitation in metallic nano-hetero structures and fabrication of high frequency devices
| Project/Area Number |
20246002
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied materials science/Crystal engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
ANDO Yasuo 東北大学, 大学院・工学研究科, 教授 (60250726)
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| Co-Investigator(Kenkyū-buntansha) |
OOGANE Mikihiko 東北大学, 大学院・工学研究科, 准教授 (50396454)
MIZUKAMI Shigemi 東北大学, 原子分子材料科学高等研究機構, 助教 (00339269)
NAGANUMA Hiroshi 東北大学, 大学院・工学研究科, 助教 (60434023)
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| Project Period (FY) |
2008 – 2010
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| Keywords | スピン流 / スピン注入 / 垂直磁気異方性 / 金属ナノヘテロ構造 / CPP-GMR / ダンピング定数 / スピントルク / スピン波 |
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| Research Abstract |
Current-Perpendicular-to-Plane Giant Magnetoresistance (CPP-GMR)nano-hetero devices with bottom free layers were fabricated on Si substrates and the spin-transfer-torque-induced rf oscillation was measured. The intensity of the oscillation became large and the half width reduced when the magnetic field was applied 90° from the easy axis and the current was between 3 mA and 7 mA. Also, a pseudo-point-contact GMR device on a coplanar waveguide with low high-frequency loss was fabricated. The high-frequency loss was reduced by 10%.
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[Journal Article] Magnetoresistance Effect in Tunnel Junctions with Perpendicularly Magnetized D0_22-Mn_<3-δ> Ga Electrode and MgO Barrier2011
Author(s)
Takahide Kubota, Yoshio Miura, Daisuke Watanabe, Shigemi Mizukami, Feng Wu, Hiroshi Naganuma, Xianmin Zhang, Mikihiko Oogane, Masafumi Shirai, Yasuo Ando, and Terunobu Miyazaki
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Journal Title
Appl. Phys. Exp.
Volume: 4
Pages: 043002-1-3
Peer Reviewed
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[Journal Article] Long-Lived Ultrafast Spin Precession in Manganese Alloys Films with a Large Perpendicular Magnetic Anisotropy2011
Author(s)
S. Mizukami, F. Wu, A. Sakuma, J. Walowski, D. Watanabe, T. Kubota, X. Zhang, H. Naganuma, M. Oogane, Y. Ando, and T. Miyazaki
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Journal Title
Phys. Rev. Lett.
Volume: 106
Pages: 117201-1-4
Peer Reviewed
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[Journal Article] Fabrication of perpendicularly magnetized magnetic tunnel junctions with L1_0-CoPt/Co_2MnSi hybrid electrode2010
Author(s)
T. Hiratsuka, G. Kim, Y. Sakuraba, T. Kubota, K. Kodama, N. Inami, H. Naganuma, M. Oogane, T. Nakamura, K. Takanashi, and Y. Ando
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Journal Title
J. Appl. Phys.
Volume: 107
Pages: 09C714-1-3
Peer Reviewed
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[Presentation] Magnetization Dynamics and Damping in Magnetic Films with Perpendicular Magnetic Anisotropy2010
Author(s)
S. Mizukami, D. Watanabe, F. Wu, T. Kubota, H. Naganuma, M. Oogane, A. Sakuma, Y. Ando, and, T. Miyazaki
Organizer
International Conference of the Asian Union of Magnetics Societies (ICAUMS2010)
Place of Presentation
Jeju, Korea
Year and Date
2010-12-07
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[Presentation] Perspective of High Tunnel Magnetoresistance in Magnetic Tunnel Junctions with Heusler Alloy Electrodes and MgO Barrier2009
Author(s)
Y. Ando, S. Tsunegi, T. Kubota, G. Kim, T. Hiratsuka, Y. Sakuraba, M. Oogane, K. Takanashi, S. Mizukami, T. Miyazaki
Organizer
Tohoku-York Research Seminar
Place of Presentation
Sendai, January
Year and Date
2009-01-20
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