Rf auto-oscillations in antiferromagnetically coupled layers with different coupling strengths

Takeshi Seki; Hiroyuki Tomita; Teruya Shinjo; Yoshishige Suzuki

doi:10.1063/1.3505357

Rf auto-oscillations in antiferromagnetically coupled layers with different coupling strengths

Takeshi Seki, Hiroyuki Tomita, Teruya Shinjo, Yoshishige Suzuki

IMR - Materials Development Division

Osaka University

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

18 Citations (Scopus)

Abstract

rf auto-oscillation induced by spin-transfer torque was investigated in Fe/Cr/Fe systems that had antiferromagnetically coupled Fe layers. As the coupling strength increased, the generation linewidth (Δf) reduced remarkably whereas the oscillation frequency (f) and the onset current of the auto-oscillation increased. The strong antiferromagnetic coupling led to less variation in f depending on the bias current. These results indicate that the antiferromagnetic coupling allows us to reduce Δf and to control the nonlinearity of the rf auto-oscillation.

Original language	English
Article number	162508
Journal	Applied Physics Letters
Volume	97
Issue number	16
DOIs	https://doi.org/10.1063/1.3505357
Publication status	Published - 2010 Oct 18

Access to Document

10.1063/1.3505357

Cite this

@article{6d9a4e7438c04d32a1e1d367d95637c0,

title = "Rf auto-oscillations in antiferromagnetically coupled layers with different coupling strengths",

abstract = "rf auto-oscillation induced by spin-transfer torque was investigated in Fe/Cr/Fe systems that had antiferromagnetically coupled Fe layers. As the coupling strength increased, the generation linewidth (Δf) reduced remarkably whereas the oscillation frequency (f) and the onset current of the auto-oscillation increased. The strong antiferromagnetic coupling led to less variation in f depending on the bias current. These results indicate that the antiferromagnetic coupling allows us to reduce Δf and to control the nonlinearity of the rf auto-oscillation.",

author = "Takeshi Seki and Hiroyuki Tomita and Teruya Shinjo and Yoshishige Suzuki",

note = "Funding Information: This work was partly supported by a Grant-in-Aid for Scientific Research in a priority area and the G-COE program of MEXT and SCOPE (Grant No. 051407005) from MIC. The first author was supported by a Research Fellowship for Young Scientists from JSPS.",

year = "2010",

month = oct,

day = "18",

doi = "10.1063/1.3505357",

language = "English",

volume = "97",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "16",

}

TY - JOUR

T1 - Rf auto-oscillations in antiferromagnetically coupled layers with different coupling strengths

AU - Seki, Takeshi

AU - Tomita, Hiroyuki

AU - Shinjo, Teruya

AU - Suzuki, Yoshishige

N1 - Funding Information: This work was partly supported by a Grant-in-Aid for Scientific Research in a priority area and the G-COE program of MEXT and SCOPE (Grant No. 051407005) from MIC. The first author was supported by a Research Fellowship for Young Scientists from JSPS.

PY - 2010/10/18

Y1 - 2010/10/18

N2 - rf auto-oscillation induced by spin-transfer torque was investigated in Fe/Cr/Fe systems that had antiferromagnetically coupled Fe layers. As the coupling strength increased, the generation linewidth (Δf) reduced remarkably whereas the oscillation frequency (f) and the onset current of the auto-oscillation increased. The strong antiferromagnetic coupling led to less variation in f depending on the bias current. These results indicate that the antiferromagnetic coupling allows us to reduce Δf and to control the nonlinearity of the rf auto-oscillation.

AB - rf auto-oscillation induced by spin-transfer torque was investigated in Fe/Cr/Fe systems that had antiferromagnetically coupled Fe layers. As the coupling strength increased, the generation linewidth (Δf) reduced remarkably whereas the oscillation frequency (f) and the onset current of the auto-oscillation increased. The strong antiferromagnetic coupling led to less variation in f depending on the bias current. These results indicate that the antiferromagnetic coupling allows us to reduce Δf and to control the nonlinearity of the rf auto-oscillation.

UR - http://www.scopus.com/inward/record.url?scp=77958500776&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77958500776&partnerID=8YFLogxK

U2 - 10.1063/1.3505357

DO - 10.1063/1.3505357

M3 - Article

AN - SCOPUS:77958500776

SN - 0003-6951

VL - 97

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 16

M1 - 162508

ER -

Rf auto-oscillations in antiferromagnetically coupled layers with different coupling strengths

Abstract

Access to Document

Other files and links

Fingerprint

Cite this