Anisotropic Hanle lineshape via anisotropic magnetothermoelectric phenomena

Abstract

We observe anisotropic Hanle lineshape with unequal in-plane and out-of-plane non-local signals for spin precession measurements carried out on lateral metallic spin valves with transparent interfaces. The conventional interpretation for this anisotropy corresponds to unequal spin relaxation times for in-plane and out-of-plane spin orientations as for the case of 2D materials like graphene, but it is unexpected in a polycrystalline metallic channel. Systematic measurements as a function of temperature and channel length, combined with both analytical and numerical thermoelectric transport models, demonstrate that the anisotropy in the Hanle lineshape is magneto-thermal in origin, caused by the anisotropic modulation of the Peltier and Seebeck coefficients of the ferromagnetic electrodes. Our results call for the consideration of such magnetothermoelectric effects in the study of anisotropic spin relaxation.

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Cited by in corpus (9)

• Spin Injection and Detection via the Anomalous Spin Hall Effect in a Ferromagnetic Metal
• Systematic Investigation of Anisotropic Magneto-Peltier Effect and Anomalous Ettingshausen Effect in Ni Thin Films
• Spintronic thermal management
• Spin-mediated charge-to-heat current conversion phenomena in ferromagnetic binary alloys
• First-principles study of the anisotropic magneto-Peltier effect
• Independent geometrical control of spin and charge resistances in curved spintronics
• Temperature dependence of the effective spin-mixing conductance probed with lateral non-local spin valves
• Thermopile based on anisotropic magneto-Peltier effect
• Charge-induced artifacts in non-local spin transport measurements: How to prevent spurious voltage signals