Structural and magnetic properties of Pt/Co/Mn-based multilayers
Structural and magnetic properties of Pt/Co/Mn-based multilayers
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DOI：
10.1103/physrevmaterials.6.054413
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发表时间：
2022-03
影响因子：
3.4
通讯作者：
Martin Lonsky;Myoung-Woo Yoo;Yi-Siou Huang;J. Qian;J. Zuo;A. Hoffmann
中科院分区：
文献类型：
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作者：
Martin Lonsky;Myoung-Woo Yoo;Yi-Siou Huang;J. Qian;J. Zuo;A. Hoffmann
磁性多层膜是一类丰富的材料系统，具有许多高度可调的物理参数，这些参数决定了它们的磁性和电子特性。在这里，我们提出了一个全面的实验研究的一种新的系统，Pt/Co/Mn，它扩展了组的Pt/Co/X（$\mathrm{X}=$金属）的多层膜，迄今已被调查。我们表明，增加Co层厚度改变的磁各向异性从面外到面内，而较厚的Mn层的沉积导致饱和磁化强度的降低。温度依赖性的磁力测量加强反铁磁耦合的Co/Mn界面负责所观察到的Mn厚度依赖性的磁化反转的假设。此外，磁光成像实验表明系统的变化，磁畴图案作为一个功能的Co和Mn层的厚度，这表明存在的气泡状域-潜在的甚至磁skyrmions -在足够厚的Mn层的情况下，预计将有助于一个相当大的Dzyaloshinskiiii-Moriya相互作用的多层堆栈。我们确定Pt/Co/Mn作为一个高度复杂的多层系统，具有很强的潜力，进一步的基础研究和可能的应用。
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.