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arXiv · 1906.03124

Angle resolved relaxation of spin currents by antiferromagnets in spin valves

Dmytro M. Polishchuk·Akashdeep Kamra·Taras I. Polek·Arne Brataas·Vladislav Korenivski
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Abstract

We observe and analyze tunable relaxation of a pure spin current by an antiferromagnet in spin-valves. This is achieved by carefully controlling the angle between a resonantly excited ferromagnetic layer pumping the spin current and the Néel vector of the antiferromagnetic layer. The effect is observed as an angle-dependent spin-pumping contribution to the ferromagnetic resonance linewidth. An interplay between spin-mixing conductance and, often disregarded, longitudinal spin conductance is found to underlie our observations, which is in agreement with a recent prediction for related ferromagnetic spin valves.

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Dmytro M. Polishchuk, Akashdeep Kamra, Taras I. Polek, Arne Brataas, Vladislav Korenivski. 2019-06-13. Angle resolved relaxation of spin currents by antiferromagnets in spin valves. https://doi.org/10.1103/physrevlett.123.247201

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