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arXiv · 2407.16005

Increased Gilbert damping in Yttrium Iron Garnet by low temperature vacuum annealing

D. M. Cheshire·D. Backes·L. Ishibe Veiga·S. S. Dhesi·S. A. Cavill
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Abstract

The effect of thermal surface cleaning on the Gilbert damping, $\alpha$, of yttrium iron garnet (YIG), before capping with a metallic layer, has been investigated. Our results show that $\alpha$ is strongly effected by relatively mild annealing conditions (T = 300 C) when performed in a vacuum. This increase needs to be taken into account when obtaining the spin mixing conductance from spin pumping measurements. We measure an increase in $\alpha$ by a factor of 8 when the YIG is vacuum annealed at 300 C. No such changes in $\alpha$ are observed when annealed at the same temperature in 0.1 mbar of oxygen.

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D. M. Cheshire, D. Backes, L. Ishibe Veiga, S. S. Dhesi, S. A. Cavill. 2024-07-22. Increased Gilbert damping in Yttrium Iron Garnet by low temperature vacuum annealing. https://arxiv.org/abs/2407.16005

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