What question did this study set out to answer?

To determine the physical mechanism responsible for anisotropic magnetoresistance in platinum films grown on electrically insulating ferromagnetic substrates.

May 13, 2013Physical Review LettersOpen Access

Spin Hall Magnetoresistance Induced by a Nonequilibrium Proximity Effect

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Authors

HNHiroyasu NakayamaJapan Science and Technology Agency MAMatthias AlthammerBavarian Academy of Sciences and Humanities YCY.-T. ChenRIKEN Center for Emergent Matter Science

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Implication

Experimental study demonstrates spin Hall magnetoresistance in platinum-insulator bilayers, indicating a mechanism driven by nonequilibrium spin transport rather than static magnetic proximity.

Key Points

To determine the physical mechanism responsible for anisotropic magnetoresistance in platinum films grown on electrically insulating ferromagnetic substrates.
Fabricated bilayers consisting of platinum and the electrical insulator yttrium iron garnet (Pt|Y3Fe5O12).
Inserted a nonmagnetic copper (Cu) spacer layer between the platinum and garnet layers (Pt|Cu|Y3Fe5O12) to test interface dependence.
Measured electrical resistivity variations in the platinum layer as a function of substrate magnetization angle.
Platinum resistance modulated directly with the magnetization orientation of the underlying insulating garnet substrate.
Magnetoresistance persisted even with an intervening copper spacer layer, confirming the effect does not arise from induced equilibrium interfacial magnetization.
The observed behavior originates from the concerted action of direct and inverse spin Hall effects, defining the spin Hall magnetoresistance phenomenon.

Cite This Study

Nakayama et al. (2013) studied this question.

synapsesocial.com/papers/6a7d551997c2c6e465965eba https://doi.org/10.1103/physrevlett.110.206601

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Implication

Experimental study demonstrates spin Hall magnetoresistance in platinum-insulator bilayers, indicating a mechanism driven by nonequilibrium spin transport rather than static magnetic proximity.

Spin Hall Magnetoresistance Induced by a Nonequilibrium Proximity Effect

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Member takes

Implication

Key Points

Cite This Study

Spin Hall Magnetoresistance Induced by a Nonequilibrium Proximity Effect

Discussion

Member takes

Implication

Key Points

Cite This Study

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