CoFeB-Based Spin Hall Nano-Oscillators

M. Ranjbar; Philipp Durrenfeld; Mohammad Haidar; Ezio Iacocca; M. Balinskiy; T. Q. Le; Masoumeh Fazlali; A. Houshang; Ahmad A. Awad; Randy K. Dumas; Johan Akerman

doi:10.1109/LMAG.2014.2375155

CoFeB-Based Spin Hall Nano-Oscillators

M. Ranjbar, Philipp Durrenfeld, Mohammad Haidar, Ezio Iacocca, M. Balinskiy, T. Q. Le, Masoumeh Fazlali, A. Houshang, Ahmad A. Awad, Randy K. Dumas, Johan Akerman

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

64 Citations (Scopus)

Abstract

We demonstrate magnetization auto-oscillations driven by pure spin currents in spin Hall nano-oscillators based on CoFeB/Pt bilayers. Despite the very low anisotropic magnetoresistance of CoFeB, a substantial microwave signal power can be detected, even at room temperature, indicating that a sizable spin wave amplitude is generated. Spin torque ferromagnetic resonance measurements reveal that the generated auto-oscillation frequency lies below the ferromagnetic resonance frequency of CoFeB and is therefore well described by a self-localized spin wave bullet mode.

Original language	English
Article number	3000504
Journal	IEEE Magnetics Letters
Volume	5
Early online date	26 Nov 2014
DOIs	https://doi.org/10.1109/LMAG.2014.2375155
Publication status	Published - 16 Dec 2014
Externally published	Yes

Keywords

Spin electronics
spin Hall nano-oscillators
spin torque ferromagnetic resonance
CoFeB

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10.1109/LMAG.2014.2375155

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title = "CoFeB-Based Spin Hall Nano-Oscillators",

abstract = "We demonstrate magnetization auto-oscillations driven by pure spin currents in spin Hall nano-oscillators based on CoFeB/Pt bilayers. Despite the very low anisotropic magnetoresistance of CoFeB, a substantial microwave signal power can be detected, even at room temperature, indicating that a sizable spin wave amplitude is generated. Spin torque ferromagnetic resonance measurements reveal that the generated auto-oscillation frequency lies below the ferromagnetic resonance frequency of CoFeB and is therefore well described by a self-localized spin wave bullet mode.",

keywords = "Spin electronics, spin Hall nano-oscillators, spin torque ferromagnetic resonance, CoFeB",

author = "M. Ranjbar and Philipp Durrenfeld and Mohammad Haidar and Ezio Iacocca and M. Balinskiy and Le, {T. Q.} and Masoumeh Fazlali and A. Houshang and Awad, {Ahmad A.} and Dumas, {Randy K.} and Johan Akerman",

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doi = "10.1109/LMAG.2014.2375155",

language = "English",

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TY - JOUR

T1 - CoFeB-Based Spin Hall Nano-Oscillators

AU - Ranjbar, M.

AU - Durrenfeld, Philipp

AU - Haidar, Mohammad

AU - Iacocca, Ezio

AU - Balinskiy, M.

AU - Le, T. Q.

AU - Fazlali, Masoumeh

AU - Houshang, A.

AU - Awad, Ahmad A.

AU - Dumas, Randy K.

AU - Akerman, Johan

PY - 2014/12/16

Y1 - 2014/12/16

N2 - We demonstrate magnetization auto-oscillations driven by pure spin currents in spin Hall nano-oscillators based on CoFeB/Pt bilayers. Despite the very low anisotropic magnetoresistance of CoFeB, a substantial microwave signal power can be detected, even at room temperature, indicating that a sizable spin wave amplitude is generated. Spin torque ferromagnetic resonance measurements reveal that the generated auto-oscillation frequency lies below the ferromagnetic resonance frequency of CoFeB and is therefore well described by a self-localized spin wave bullet mode.

AB - We demonstrate magnetization auto-oscillations driven by pure spin currents in spin Hall nano-oscillators based on CoFeB/Pt bilayers. Despite the very low anisotropic magnetoresistance of CoFeB, a substantial microwave signal power can be detected, even at room temperature, indicating that a sizable spin wave amplitude is generated. Spin torque ferromagnetic resonance measurements reveal that the generated auto-oscillation frequency lies below the ferromagnetic resonance frequency of CoFeB and is therefore well described by a self-localized spin wave bullet mode.

KW - Spin electronics

KW - spin Hall nano-oscillators

KW - spin torque ferromagnetic resonance

KW - CoFeB

U2 - 10.1109/LMAG.2014.2375155

DO - 10.1109/LMAG.2014.2375155

M3 - Article

SN - 1949-307X

VL - 5

JO - IEEE Magnetics Letters

JF - IEEE Magnetics Letters

M1 - 3000504

ER -

CoFeB-Based Spin Hall Nano-Oscillators

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Keywords

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