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arXiv · 2203.10059

Structural and Magnetic Properties of Pt/Co/Mn-Based Multilayers

Martin Lonsky·Myoung-Woo Yoo·Yi-Siou Huang·Jiangchao Qian·Jian-Min Zuo·Axel Hoffmann
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Abstract

Magnetic multilayers are a rich class of materials systems with numerous highly tunable physical parameters that determine both their magnetic and electronic properties. Here we present a comprehensive experimental study of a novel system, Pt/Co/Mn, which extends the group of Pt/Co/X ($\mathrm{X}=$ metal) multilayers that have been investigated thus far. We demonstrate that an increasing Co layer thickness changes the magnetic anisotropy from out-of-plane to in-plane, whereas the deposition of thicker Mn layers leads to a decrease in the saturation magnetization. Temperature-dependent magnetometry measurements reinforce the hypothesis of antiferromagnetic coupling at the Co/Mn interfaces being responsible for the observed Mn thickness dependence of the magnetization reversal. Moreover, magneto-optical imaging experiments indicate systematic changes in magnetic domain patterns as a function of the Co and Mn layer thickness, suggesting the existence of bubble-like domains -- potentially even magnetic skyrmions -- in the case of sufficiently thick Mn layers, which are expected to contribute to a sizeable Dzyaloshinskii-Moriya interaction in the multilayer stacks. We identify Pt/Co/Mn as a highly complex multilayer system with strong potential for further fundamental studies and possible applications.

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Martin Lonsky, Myoung-Woo Yoo, Yi-Siou Huang, Jiangchao Qian, Jian-Min Zuo, Axel Hoffmann. 2022-03-18. Structural and Magnetic Properties of Pt/Co/Mn-Based Multilayers. https://doi.org/10.1103/physrevmaterials.6.054413

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