Ruthi Zielinski, Nhat Nguyen, Bryce Herrington, Amir Tarkian, Omar Taha, Wai Kiat Chin, Ather Mahmood, Xiaoqian Chen, Christoph Klewe, Padraic Shafer, Jim Ciston, Paul Ashby, Claudio Mazzoli, Robert Streubel
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引用次数: 0
摘要
我们研究了应变对纳米粒状 FexGe1-x 薄膜（x = 0.53 ±0.05）的磁性能和磁化配置的影响，这些薄膜有的含有 B20 FeGe 纳米晶体，有的没有，周围是无定形结构。非晶氮化硅膜上的弛豫薄膜显示出无序的天融相，而在刚性基底附近和顶部的薄膜则具有铁磁性以及铁 d 层和自旋极化 Ge sp 带态的各向异性杂化。弱耦合拓扑态在室温下出现，并在低温下变得更加丰富，但没有显示出在缺陷处的钉扎现象或局限于单个晶粒的迹象。这些结果证明了通过应变控制磁交换和拓扑磁性的可能性，并为非晶量子材料中拓扑相的磁弹性介导电压控制提供了信息。
Magnetic order in nanogranular iron germanium (Fe0.53Ge0.47) films.
We study the effect of strain on the magnetic properties and magnetization configurations in nanogranular FexGe1-xfilms (x=0.53±0.05) with and without B20 FeGe nanocrystals surrounded by an amorphous structure. Relaxed films on amorphous silicon nitride membranes reveal a disordered skyrmion phase while films near and on top of a rigid substrate favor ferromagnetism and an anisotropic hybridization of Fedlevels and spin-polarized Gespband states. The weakly coupled topological states emerge at room temperature and become more abundant at cryogenic temperatures without showing indications of pinning at defects or confinement to individual grains. These results demonstrate the possibility to control magnetic exchange and topological magnetism by strain and inform magnetoelasticity-mediated voltage control of topological phases in amorphous quantum materials.
期刊介绍：
Journal of Physics: Condensed Matter covers the whole of condensed matter physics including soft condensed matter and nanostructures. Papers may report experimental, theoretical and simulation studies. Note that papers must contain fundamental condensed matter science: papers reporting methods of materials preparation or properties of materials without novel condensed matter content will not be accepted.
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