Effect of current-induced magnetic field on magnetization dynamics in spin-torque nano-oscillator with point-contact geometry

Woo Yeong Kim; Kyung Jin Lee

doi:10.1016/j.cap.2013.01.028

Effect of current-induced magnetic field on magnetization dynamics in spin-torque nano-oscillator with point-contact geometry

Woo Yeong Kim, Kyung Jin Lee

Department of Materials Science and Engineering

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

7 Citations (Scopus)

Abstract

We show micromagnetic simulation results for spin-torque nano-oscillator (STNO) with point-contact geometry. Numerical results obtained from three different models are compared in order to investigate the effect of current-induced Oersted field and non-uniform current distribution on the characteristics of STNO. It is found that the Oersted field and non-uniform current distribution affect the frequency and precession mode both qualitatively and quantitatively. An anisotropic emission of spin-waves is observed only when considering the Oersted field properly. Our results suggest that a realistic consideration of the current distribution and consequent Oersted field distribution is of critical important to design STNOs and to understand the characteristics of STNOs.

Original language	English
Pages (from-to)	890-893
Number of pages	4
Journal	Current Applied Physics
Volume	13
Issue number	5
DOIs	https://doi.org/10.1016/j.cap.2013.01.028
Publication status	Published - 2013 Jul

Keywords

Micromagnetics
Spin-torque nano-oscillator
Spin-transfer torque

ASJC Scopus subject areas

Materials Science(all)
Physics and Astronomy(all)

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10.1016/j.cap.2013.01.028

Cite this

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title = "Effect of current-induced magnetic field on magnetization dynamics in spin-torque nano-oscillator with point-contact geometry",

abstract = "We show micromagnetic simulation results for spin-torque nano-oscillator (STNO) with point-contact geometry. Numerical results obtained from three different models are compared in order to investigate the effect of current-induced Oersted field and non-uniform current distribution on the characteristics of STNO. It is found that the Oersted field and non-uniform current distribution affect the frequency and precession mode both qualitatively and quantitatively. An anisotropic emission of spin-waves is observed only when considering the Oersted field properly. Our results suggest that a realistic consideration of the current distribution and consequent Oersted field distribution is of critical important to design STNOs and to understand the characteristics of STNOs.",

keywords = "Micromagnetics, Spin-torque nano-oscillator, Spin-transfer torque",

author = "Kim, {Woo Yeong} and Lee, {Kyung Jin}",

note = "Funding Information: This work was supported by the NRF ( 2010-0023798 , 2011-0028163 ), by the MEST Pioneer Research Center Program ( 2011-0027905 ), and KU-KIST School Joint Research Program. ",

year = "2013",

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doi = "10.1016/j.cap.2013.01.028",

language = "English",

volume = "13",

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journal = "Current Applied Physics",

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T1 - Effect of current-induced magnetic field on magnetization dynamics in spin-torque nano-oscillator with point-contact geometry

AU - Kim, Woo Yeong

AU - Lee, Kyung Jin

N1 - Funding Information: This work was supported by the NRF ( 2010-0023798 , 2011-0028163 ), by the MEST Pioneer Research Center Program ( 2011-0027905 ), and KU-KIST School Joint Research Program.

PY - 2013/7

Y1 - 2013/7

N2 - We show micromagnetic simulation results for spin-torque nano-oscillator (STNO) with point-contact geometry. Numerical results obtained from three different models are compared in order to investigate the effect of current-induced Oersted field and non-uniform current distribution on the characteristics of STNO. It is found that the Oersted field and non-uniform current distribution affect the frequency and precession mode both qualitatively and quantitatively. An anisotropic emission of spin-waves is observed only when considering the Oersted field properly. Our results suggest that a realistic consideration of the current distribution and consequent Oersted field distribution is of critical important to design STNOs and to understand the characteristics of STNOs.

AB - We show micromagnetic simulation results for spin-torque nano-oscillator (STNO) with point-contact geometry. Numerical results obtained from three different models are compared in order to investigate the effect of current-induced Oersted field and non-uniform current distribution on the characteristics of STNO. It is found that the Oersted field and non-uniform current distribution affect the frequency and precession mode both qualitatively and quantitatively. An anisotropic emission of spin-waves is observed only when considering the Oersted field properly. Our results suggest that a realistic consideration of the current distribution and consequent Oersted field distribution is of critical important to design STNOs and to understand the characteristics of STNOs.

KW - Micromagnetics

KW - Spin-torque nano-oscillator

KW - Spin-transfer torque

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DO - 10.1016/j.cap.2013.01.028

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SN - 1567-1739

VL - 13

SP - 890

EP - 893

JO - Current Applied Physics

JF - Current Applied Physics

IS - 5

ER -

Effect of current-induced magnetic field on magnetization dynamics in spin-torque nano-oscillator with point-contact geometry

Abstract

Keywords

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