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American Institute of Physics, Applied Physics Letters, 25(110), p. 252406

DOI: 10.1063/1.4989678

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Spin-pumping through a varying-thickness MgO interlayer in Fe/Pt system

This paper is available in a repository.
This paper is available in a repository.

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Abstract

The spin-pumping mechanism is probed through a tunnelling MgO interlayer in Fe/Pt bilayers. We show by ferromagnetic resonance technique and spin-pumping experiments that spin currents can tunnel through the MgO interlayer for thickness up to 2~{nm} and can produce significant voltages in the Pt layer. The electrical detection of spin-pumping furthermore reveals the critical role of rectification and shunting effects on the generated voltages. The non zero spin current transport through a few monolayers of an insulating interlayer might initiate further studies on the role of very thin oxides in spin-pumping experiments. ; Comment: 5 pages, 4 figures