Spin-transfer-torque-induced ferromagnetic resonance for Fe/Cr/Fe layers with an antiferromagnetic coupling field

Takeshi Seki; Hiroyuki Tomita; Ashwin A. Tulapurkar; Masashi Shiraishi; Teruya Shinjo; Yoshishige Suzuki

doi:10.1063/1.3143625

Spin-transfer-torque-induced ferromagnetic resonance for Fe/Cr/Fe layers with an antiferromagnetic coupling field

Takeshi Seki, Hiroyuki Tomita, Ashwin A. Tulapurkar, Masashi Shiraishi, Teruya Shinjo, Yoshishige Suzuki

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

13 Citations (Scopus)

Abstract

In order to understand the effect of spin-transfer-torque (STT) on artificial magnetic structures, STT-induced and magnetic field-induced ferromagnetic resonances (FMRs) were investigated for Fe/Cr/Fe layers with an antiferromagnetic coupling field. The magnetic field-induced FMR showed high resonant frequency at zero magnetic field owing to the antiferromagnetic coupling field. FMR modes characteristic of antiferromagnetic coupling were induced by STT. From the STT-FMR spectra, the critical current density for magnetization instability was estimated to be ∼7× 107 A/ cm2, suggesting the possibility that STT gives rise to the dynamic phase of magnetization in such artificial magnetic structures.

Original language	English
Article number	212505
Journal	Applied Physics Letters
Volume	94
Issue number	21
DOIs	https://doi.org/10.1063/1.3143625
Publication status	Published - 2009
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Access to Document

10.1063/1.3143625

Cite this

@article{3f772e73ab264ecda7a3d062ac17c345,

title = "Spin-transfer-torque-induced ferromagnetic resonance for Fe/Cr/Fe layers with an antiferromagnetic coupling field",

abstract = "In order to understand the effect of spin-transfer-torque (STT) on artificial magnetic structures, STT-induced and magnetic field-induced ferromagnetic resonances (FMRs) were investigated for Fe/Cr/Fe layers with an antiferromagnetic coupling field. The magnetic field-induced FMR showed high resonant frequency at zero magnetic field owing to the antiferromagnetic coupling field. FMR modes characteristic of antiferromagnetic coupling were induced by STT. From the STT-FMR spectra, the critical current density for magnetization instability was estimated to be ∼7× 107 A/ cm2, suggesting the possibility that STT gives rise to the dynamic phase of magnetization in such artificial magnetic structures.",

author = "Takeshi Seki and Hiroyuki Tomita and Tulapurkar, {Ashwin A.} and Masashi Shiraishi and Teruya Shinjo and Yoshishige Suzuki",

note = "Funding Information: This work was partly supported by a Grant-in-Aid for Scientific Research in Priority Area from MEXT and SCOPE from MIC. The first author was supported by Research Fellowship of JSPS for Young Scientists. ",

year = "2009",

doi = "10.1063/1.3143625",

language = "English",

volume = "94",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "21",

}

TY - JOUR

T1 - Spin-transfer-torque-induced ferromagnetic resonance for Fe/Cr/Fe layers with an antiferromagnetic coupling field

AU - Seki, Takeshi

AU - Tomita, Hiroyuki

AU - Tulapurkar, Ashwin A.

AU - Shiraishi, Masashi

AU - Shinjo, Teruya

AU - Suzuki, Yoshishige

N1 - Funding Information: This work was partly supported by a Grant-in-Aid for Scientific Research in Priority Area from MEXT and SCOPE from MIC. The first author was supported by Research Fellowship of JSPS for Young Scientists.

PY - 2009

Y1 - 2009

N2 - In order to understand the effect of spin-transfer-torque (STT) on artificial magnetic structures, STT-induced and magnetic field-induced ferromagnetic resonances (FMRs) were investigated for Fe/Cr/Fe layers with an antiferromagnetic coupling field. The magnetic field-induced FMR showed high resonant frequency at zero magnetic field owing to the antiferromagnetic coupling field. FMR modes characteristic of antiferromagnetic coupling were induced by STT. From the STT-FMR spectra, the critical current density for magnetization instability was estimated to be ∼7× 107 A/ cm2, suggesting the possibility that STT gives rise to the dynamic phase of magnetization in such artificial magnetic structures.

AB - In order to understand the effect of spin-transfer-torque (STT) on artificial magnetic structures, STT-induced and magnetic field-induced ferromagnetic resonances (FMRs) were investigated for Fe/Cr/Fe layers with an antiferromagnetic coupling field. The magnetic field-induced FMR showed high resonant frequency at zero magnetic field owing to the antiferromagnetic coupling field. FMR modes characteristic of antiferromagnetic coupling were induced by STT. From the STT-FMR spectra, the critical current density for magnetization instability was estimated to be ∼7× 107 A/ cm2, suggesting the possibility that STT gives rise to the dynamic phase of magnetization in such artificial magnetic structures.

UR - http://www.scopus.com/inward/record.url?scp=66549121881&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=66549121881&partnerID=8YFLogxK

U2 - 10.1063/1.3143625

DO - 10.1063/1.3143625

M3 - Article

AN - SCOPUS:66549121881

SN - 0003-6951

VL - 94

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 21

M1 - 212505

ER -

Spin-transfer-torque-induced ferromagnetic resonance for Fe/Cr/Fe layers with an antiferromagnetic coupling field

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this