Spin Hall magnetoresistance at high temperatures

Journal Article · Mon Feb 02 04:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4907546· OSTI ID:22420256

Uchida, Ken-ichi ^[1]; Qiu, Zhiyong ^[2]; Kikkawa, Takashi; Iguchi, Ryo ^[1]; Saitoh, Eiji ^[1]

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1. Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
2. Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577 (Japan)

The temperature dependence of spin Hall magnetoresistance (SMR) in Pt/Y{sub 3}Fe{sub 5}O{sub 12} (YIG) bilayer films has been investigated in a high temperature range from room temperature to near the Curie temperature of YIG. The experimental results show that the magnitude of the magnetoresistance ratio induced by the SMR monotonically decreases with increasing the temperature and almost disappears near the Curie temperature. We found that, near the Curie temperature, the temperature dependence of the SMR in the Pt/YIG film is steeper than that of a magnetization curve of the YIG; the critical exponent of the magnetoresistance ratio is estimated to be 0.9. This critical behavior of the SMR is attributed mainly to the temperature dependence of the spin-mixing conductance at the Pt/YIG interface.

• OSTI ID: 22420256
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 5 Vol. 106; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CURIE POINT
FERRITE GARNETS
FILMS
HALL EFFECT
IRON OXIDES
MAGNETIZATION
MAGNETORESISTANCE
PLATINUM
SPIN
YTTRIUM COMPOUNDS