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

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.

arXiv comment5 pages, 4 figures

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Cited by in corpus (12)

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• Determination of the spin Hall angle in single-crystalline Pt films from spin pumping experiments
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• Anisotropic superconducting spin transport at magnetic interfaces
• Evidence of Pure Spin-Current Generated by Spin Pumping in Interface Localized States in Hybrid Metal-Silicon-Metal Vertical Structures
• Using rf voltage induced ferromagnetic resonance to study the spin-wave density of states and the Gilbert damping in perpendicularly magnetized disks
• Orbital-excitation-dominated magnetization dissipation and quantum oscillation of Gilbert damping in Fe films
• Enhancement of spin mixing conductance in La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$/LaNiO${}_3$/SrRuO${}_3$ heterostructures
• Spin-current mediated exchange coupling in MgO-based magnetic tunnel junctions
• Spin Hall Induced Magnetization Dynamics in Multiferroic Tunnel Junction
• Spin transport and magnetic proximity effect in CoFeB/normal metal/Pt trilayers
• A Microscopic Explanation of Microwave Spin Pumping