High power radio frequency oscillation by spin transfer torque in a Co 2MnSi layer: Experiment and macrospin simulation

Takeshi Seki; Yuya Sakuraba; Ryo Okura; Koki Takanashi

doi:10.1063/1.4776719

High power radio frequency oscillation by spin transfer torque in a Co ₂MnSi layer: Experiment and macrospin simulation

Takeshi Seki, Yuya Sakuraba, Ryo Okura, Koki Takanashi

Materials Development Division

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

We experimentally and numerically investigated rf oscillation induced by spin transfer torque in a current-perpendicular-to-plane giant magnetoresistance (GMR) device with full-Heusler Co₂MnSi (CMS) layers. High output power (P_rf) of 1 nW was experimentally achieved owing to the large GMR effect resulting from the half-metallic feature of the CMS layers. However, the high power rf oscillation was observed only in the narrow dc current (I _dc) region. Macrospin simulation suggested that the high spin polarization of CMS layers led to narrowing the optimum I_dc region for the rf oscillation.

Original language	English
Article number	033907
Journal	Journal of Applied Physics
Volume	113
Issue number	3
DOIs	https://doi.org/10.1063/1.4776719
Publication status	Published - 2013 Jan 21

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1063/1.4776719

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title = "High power radio frequency oscillation by spin transfer torque in a Co 2MnSi layer: Experiment and macrospin simulation",

abstract = "We experimentally and numerically investigated rf oscillation induced by spin transfer torque in a current-perpendicular-to-plane giant magnetoresistance (GMR) device with full-Heusler Co2MnSi (CMS) layers. High output power (Prf) of 1 nW was experimentally achieved owing to the large GMR effect resulting from the half-metallic feature of the CMS layers. However, the high power rf oscillation was observed only in the narrow dc current (I dc) region. Macrospin simulation suggested that the high spin polarization of CMS layers led to narrowing the optimum Idc region for the rf oscillation.",

author = "Takeshi Seki and Yuya Sakuraba and Ryo Okura and Koki Takanashi",

note = "Funding Information: This work was partly supported by a Grant-in-Aid for Scientific Research (B) (No. 23360004) from MEXT, and the Japan Science and Technology (JST) Agency through its Strategic International Cooperative Program under the title “Advanced spintronic materials and transport phenomena (ASPIMATT).” The microfabrication was partly carried out at the Advanced Research Center of Metallic Glasses, IMR, Tohoku University.",

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T1 - High power radio frequency oscillation by spin transfer torque in a Co 2MnSi layer

T2 - Experiment and macrospin simulation

AU - Seki, Takeshi

AU - Sakuraba, Yuya

AU - Okura, Ryo

AU - Takanashi, Koki

N1 - Funding Information: This work was partly supported by a Grant-in-Aid for Scientific Research (B) (No. 23360004) from MEXT, and the Japan Science and Technology (JST) Agency through its Strategic International Cooperative Program under the title “Advanced spintronic materials and transport phenomena (ASPIMATT).” The microfabrication was partly carried out at the Advanced Research Center of Metallic Glasses, IMR, Tohoku University.

PY - 2013/1/21

Y1 - 2013/1/21

N2 - We experimentally and numerically investigated rf oscillation induced by spin transfer torque in a current-perpendicular-to-plane giant magnetoresistance (GMR) device with full-Heusler Co2MnSi (CMS) layers. High output power (Prf) of 1 nW was experimentally achieved owing to the large GMR effect resulting from the half-metallic feature of the CMS layers. However, the high power rf oscillation was observed only in the narrow dc current (I dc) region. Macrospin simulation suggested that the high spin polarization of CMS layers led to narrowing the optimum Idc region for the rf oscillation.

AB - We experimentally and numerically investigated rf oscillation induced by spin transfer torque in a current-perpendicular-to-plane giant magnetoresistance (GMR) device with full-Heusler Co2MnSi (CMS) layers. High output power (Prf) of 1 nW was experimentally achieved owing to the large GMR effect resulting from the half-metallic feature of the CMS layers. However, the high power rf oscillation was observed only in the narrow dc current (I dc) region. Macrospin simulation suggested that the high spin polarization of CMS layers led to narrowing the optimum Idc region for the rf oscillation.

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High power radio frequency oscillation by spin transfer torque in a Co ₂MnSi layer: Experiment and macrospin simulation

Abstract

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