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arXiv · 1702.05298

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

Laura Mihalceanu·Sascha Keller·Jochen Greser·Dimitrios Karfaridis·Konstantinos Symeonidis·Georgios Vourlias·Thomas Kehagias·Andres Conca·Burkard Hillebrands·Evangelos Th. Papaioannou
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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.

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Laura Mihalceanu, Sascha Keller, Jochen Greser, Dimitrios Karfaridis, Konstantinos Symeonidis, Georgios Vourlias, Thomas Kehagias, Andres Conca, Burkard Hillebrands, Evangelos Th. Papaioannou. 2017-02-17. Spin-pumping through a varying-thickness MgO interlayer in Fe/Pt system. https://doi.org/10.1063/1.4989678

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