Modelling high-power spin-torque oscillator with perpendicular magnetization in half-metallic Heusler alloy spin valve nanopillar

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

doi:10.1016/j.jallcom.2014.01.235

Modelling high-power spin-torque oscillator with perpendicular magnetization in half-metallic Heusler alloy spin valve nanopillar

H. B. Huang^*, X. Q. Ma, Z. H. Liu, L. Q. Chen

^*Corresponding author for this work

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

19 Citations (Scopus)

Abstract

We investigated the high-power spin-torque oscillator in a half-metallic Heusler alloy Co₂MnSi spin-valve nanopillars with perpendicular magnetization using micromagnetic simulations. A stable high output power spin transfer precession was obtained in the condition of zero external magnetic field, and the narrow current of oscillation due to the high spin polarization of Heusler alloy is significantly widened by introducing the surface anisotropy. Furthermore, we discussed the current dependence of oscillation frequency and explained the blue frequency shift using the trajectories and spatial magnetic domains.

Original language	English
Pages (from-to)	230-235
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	597
DOIs	https://doi.org/10.1016/j.jallcom.2014.01.235
Publication status	Published - 5 Jun 2014
Externally published	Yes

Keywords

Heusler alloy
Magnetization precession
Micromagnetic simulation
Spin torque oscillator
Spin-valve nanopillar

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10.1016/j.jallcom.2014.01.235

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title = "Modelling high-power spin-torque oscillator with perpendicular magnetization in half-metallic Heusler alloy spin valve nanopillar",

abstract = "We investigated the high-power spin-torque oscillator in a half-metallic Heusler alloy Co2MnSi spin-valve nanopillars with perpendicular magnetization using micromagnetic simulations. A stable high output power spin transfer precession was obtained in the condition of zero external magnetic field, and the narrow current of oscillation due to the high spin polarization of Heusler alloy is significantly widened by introducing the surface anisotropy. Furthermore, we discussed the current dependence of oscillation frequency and explained the blue frequency shift using the trajectories and spatial magnetic domains.",

keywords = "Heusler alloy, Magnetization precession, Micromagnetic simulation, Spin torque oscillator, Spin-valve nanopillar",

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

year = "2014",

month = jun,

day = "5",

doi = "10.1016/j.jallcom.2014.01.235",

language = "English",

volume = "597",

pages = "230--235",

journal = "Journal of Alloys and Compounds",

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T1 - Modelling high-power spin-torque oscillator with perpendicular magnetization in half-metallic Heusler alloy spin valve nanopillar

AU - Huang, H. B.

AU - Ma, X. Q.

AU - Liu, Z. H.

AU - Chen, L. Q.

PY - 2014/6/5

Y1 - 2014/6/5

N2 - We investigated the high-power spin-torque oscillator in a half-metallic Heusler alloy Co2MnSi spin-valve nanopillars with perpendicular magnetization using micromagnetic simulations. A stable high output power spin transfer precession was obtained in the condition of zero external magnetic field, and the narrow current of oscillation due to the high spin polarization of Heusler alloy is significantly widened by introducing the surface anisotropy. Furthermore, we discussed the current dependence of oscillation frequency and explained the blue frequency shift using the trajectories and spatial magnetic domains.

AB - We investigated the high-power spin-torque oscillator in a half-metallic Heusler alloy Co2MnSi spin-valve nanopillars with perpendicular magnetization using micromagnetic simulations. A stable high output power spin transfer precession was obtained in the condition of zero external magnetic field, and the narrow current of oscillation due to the high spin polarization of Heusler alloy is significantly widened by introducing the surface anisotropy. Furthermore, we discussed the current dependence of oscillation frequency and explained the blue frequency shift using the trajectories and spatial magnetic domains.

KW - Heusler alloy

KW - Magnetization precession

KW - Micromagnetic simulation

KW - Spin torque oscillator

KW - Spin-valve nanopillar

UR - http://www.scopus.com/inward/record.url?scp=84894631472&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2014.01.235

DO - 10.1016/j.jallcom.2014.01.235

M3 - Article

AN - SCOPUS:84894631472

SN - 0925-8388

VL - 597

SP - 230

EP - 235

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Modelling high-power spin-torque oscillator with perpendicular magnetization in half-metallic Heusler alloy spin valve nanopillar

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Keywords

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