Micromagnetic simulation of high-power spin-torque oscillator in half-metallic Heusler alloy spin valve nanopillar

H. B. Huang; X. Q. Ma; Z. H. Liu; C. P. Zhao; L. Q. Chen

doi:10.1063/1.4796189

Micromagnetic simulation of high-power spin-torque oscillator in half-metallic Heusler alloy spin valve nanopillar

H. B. Huang, X. Q. Ma, Z. H. Liu, C. P. Zhao, L. Q. Chen

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

19 Scopus citations

Abstract

We investigated the spin-torque oscillator in a half-metallic Heusler alloy Co₂MnSi (CMS) spin-valve nanopillar using micromagnetic simulations. Although it is known that the out-of-plane precession (OPP) usually has a larger power output than the in-plane precession (IPP), only IPP mode was experimentally observed in CMS. Our simulations revealed the fundamental and second harmonic radio frequency (rf) oscillations of the IPP mode, consistent with the experimental measurements in CMS-based pillars. Our simulations predicted that the OPP mode can be obtained under the condition of an initially antiparallel state, a small external magnetic field, and a sufficiently large current density.

Original language	English (US)
Article number	032132
Journal	AIP Advances
Volume	3
Issue number	3
DOIs	https://doi.org/10.1063/1.4796189
State	Published - Mar 2013

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1063/1.4796189

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title = "Micromagnetic simulation of high-power spin-torque oscillator in half-metallic Heusler alloy spin valve nanopillar",

abstract = "We investigated the spin-torque oscillator in a half-metallic Heusler alloy Co2MnSi (CMS) spin-valve nanopillar using micromagnetic simulations. Although it is known that the out-of-plane precession (OPP) usually has a larger power output than the in-plane precession (IPP), only IPP mode was experimentally observed in CMS. Our simulations revealed the fundamental and second harmonic radio frequency (rf) oscillations of the IPP mode, consistent with the experimental measurements in CMS-based pillars. Our simulations predicted that the OPP mode can be obtained under the condition of an initially antiparallel state, a small external magnetic field, and a sufficiently large current density.",

author = "Huang, {H. B.} and Ma, {X. Q.} and Liu, {Z. H.} and Zhao, {C. P.} and Chen, {L. Q.}",

note = "Funding Information: This work was sponsored by the National Science Foundation of China (11174030), by the US National Science Foundation under the grant number DMR-1006541 (Chen) and in part by the China Scholarship Council. The computer simulations were carried out on the LION and Cyberstar clusters at the Pennsylvania State University.",

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language = "English (US)",

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T1 - Micromagnetic simulation of high-power spin-torque oscillator in half-metallic Heusler alloy spin valve nanopillar

AU - Huang, H. B.

AU - Ma, X. Q.

AU - Liu, Z. H.

AU - Zhao, C. P.

AU - Chen, L. Q.

N1 - Funding Information: This work was sponsored by the National Science Foundation of China (11174030), by the US National Science Foundation under the grant number DMR-1006541 (Chen) and in part by the China Scholarship Council. The computer simulations were carried out on the LION and Cyberstar clusters at the Pennsylvania State University.

PY - 2013/3

Y1 - 2013/3

N2 - We investigated the spin-torque oscillator in a half-metallic Heusler alloy Co2MnSi (CMS) spin-valve nanopillar using micromagnetic simulations. Although it is known that the out-of-plane precession (OPP) usually has a larger power output than the in-plane precession (IPP), only IPP mode was experimentally observed in CMS. Our simulations revealed the fundamental and second harmonic radio frequency (rf) oscillations of the IPP mode, consistent with the experimental measurements in CMS-based pillars. Our simulations predicted that the OPP mode can be obtained under the condition of an initially antiparallel state, a small external magnetic field, and a sufficiently large current density.

AB - We investigated the spin-torque oscillator in a half-metallic Heusler alloy Co2MnSi (CMS) spin-valve nanopillar using micromagnetic simulations. Although it is known that the out-of-plane precession (OPP) usually has a larger power output than the in-plane precession (IPP), only IPP mode was experimentally observed in CMS. Our simulations revealed the fundamental and second harmonic radio frequency (rf) oscillations of the IPP mode, consistent with the experimental measurements in CMS-based pillars. Our simulations predicted that the OPP mode can be obtained under the condition of an initially antiparallel state, a small external magnetic field, and a sufficiently large current density.

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Micromagnetic simulation of high-power spin-torque oscillator in half-metallic Heusler alloy spin valve nanopillar

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