TY - JOUR
T1 - Effective exchange fields in spin-torque resonance of magnetic insulators
AU - Chiba, Takahiro
AU - Bauer, Gerrit E.W.
AU - Takahashi, Saburo
N1 - Funding Information:
We would like to thank Michael Schreier and Ryo Iguchi for valuable discussions. This work was supported by KAKENHI (Grants-in-Aid for Scientific Research) Nos. 22540346 , 25247056 , 25220910 , and 268063 , FOM (Stichting voor Fundamenteel Onderzoek der Materie) , EU-FET grant InSpin 612759 , and DFG Priority Programme 1538 “Spin-Caloric Transport” (Grant no. BA 2954/2 ).
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2016/2/15
Y1 - 2016/2/15
N2 - We report additional results on the spin-torque ferromagnetic resonance (ST-FMR) of a bilayer system made from a magnetic insulator such as Y3Fe5O12 (YIG) and a heavy normal metal such as Pt in terms of the interface spin-mixing conductance and including spin pumping. We analyze experimental ST-FMR spectra for out-of-plane and in-plane magnetization configurations in terms of an anisotropic imaginary part Gi of the mixing conductance (or interface effective field). The estimated ratio between imaginary and real parts Gi/Gr≲0.3 is sensitive to an (unknown) phase shift between microwave current bias and associated Oersted field.
AB - We report additional results on the spin-torque ferromagnetic resonance (ST-FMR) of a bilayer system made from a magnetic insulator such as Y3Fe5O12 (YIG) and a heavy normal metal such as Pt in terms of the interface spin-mixing conductance and including spin pumping. We analyze experimental ST-FMR spectra for out-of-plane and in-plane magnetization configurations in terms of an anisotropic imaginary part Gi of the mixing conductance (or interface effective field). The estimated ratio between imaginary and real parts Gi/Gr≲0.3 is sensitive to an (unknown) phase shift between microwave current bias and associated Oersted field.
KW - Spin-Hall magnetoresistance
KW - Spin-mixing conductance
KW - Spin-torque ferromagnetic resonance
KW - Yttrium iron garnet
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U2 - 10.1016/j.jmmm.2015.07.058
DO - 10.1016/j.jmmm.2015.07.058
M3 - Article
AN - SCOPUS:84949729416
SN - 0304-8853
VL - 400
SP - 163
EP - 167
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
ER -