Zero-field spin torque oscillation in Co2(Fe, Mn)Si with a point contact geometry

T. Yamamoto; T. Seki; T. Kubota; H. Yako; K. Takanashi

doi:10.1063/1.4914375

Zero-field spin torque oscillation in Co₂(Fe, Mn)Si with a point contact geometry

T. Yamamoto, T. Seki, T. Kubota, H. Yako, K. Takanashi

Materials Development Division

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

13 Citations (Scopus)

Abstract

We show spin torque oscillation at zero external magnetic field using a point-contact giant magnetoresistance device with a highly spin-polarized Co₂Fe_0.4Mn_0.6Si (CFMS) Heusler alloy. The device emitted a high rf power (P_rf) signal with a narrow spectral linewidth of 3 MHz without external magnetic field. Depending on the applied current, mode changes were clearly observed, and a large P_rf of 25.7 nW was achieved. The large P_rf and the high coherency of oscillation are attributable to the combination of the high spin-polarization of CFMS and the advantages of point-contact geometry.

Original language	English
Article number	092406
Journal	Applied Physics Letters
Volume	106
Issue number	9
DOIs	https://doi.org/10.1063/1.4914375
Publication status	Published - 2015 Mar 2

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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abstract = "We show spin torque oscillation at zero external magnetic field using a point-contact giant magnetoresistance device with a highly spin-polarized Co2Fe0.4Mn0.6Si (CFMS) Heusler alloy. The device emitted a high rf power (Prf) signal with a narrow spectral linewidth of 3 MHz without external magnetic field. Depending on the applied current, mode changes were clearly observed, and a large Prf of 25.7 nW was achieved. The large Prf and the high coherency of oscillation are attributable to the combination of the high spin-polarization of CFMS and the advantages of point-contact geometry.",

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T1 - Zero-field spin torque oscillation in Co2(Fe, Mn)Si with a point contact geometry

AU - Yamamoto, T.

AU - Seki, T.

AU - Kubota, T.

AU - Yako, H.

AU - Takanashi, K.

PY - 2015/3/2

Y1 - 2015/3/2

N2 - We show spin torque oscillation at zero external magnetic field using a point-contact giant magnetoresistance device with a highly spin-polarized Co2Fe0.4Mn0.6Si (CFMS) Heusler alloy. The device emitted a high rf power (Prf) signal with a narrow spectral linewidth of 3 MHz without external magnetic field. Depending on the applied current, mode changes were clearly observed, and a large Prf of 25.7 nW was achieved. The large Prf and the high coherency of oscillation are attributable to the combination of the high spin-polarization of CFMS and the advantages of point-contact geometry.

AB - We show spin torque oscillation at zero external magnetic field using a point-contact giant magnetoresistance device with a highly spin-polarized Co2Fe0.4Mn0.6Si (CFMS) Heusler alloy. The device emitted a high rf power (Prf) signal with a narrow spectral linewidth of 3 MHz without external magnetic field. Depending on the applied current, mode changes were clearly observed, and a large Prf of 25.7 nW was achieved. The large Prf and the high coherency of oscillation are attributable to the combination of the high spin-polarization of CFMS and the advantages of point-contact geometry.

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