On Curie temperature of B20-MnSi films

Li Z, Yuan Y, Begeza V, Rebohle L, Helm M, Nielsch K, Prucnal S, Zhou S (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Scientific Reports Nature Publishing Group: Open Access Journals - Option B

Book Volume: 12

Article Number: 16388

Journal Issue: 1

DOI: 10.1038/s41598-022-20483-2

Abstract

B20-type MnSi is the prototype magnetic skyrmion material. Thin films of MnSi show a higher Curie temperature than their bulk counterpart. However, it is not yet clear what mechanism leads to the increase of the Curie temperature. In this work, we grow MnSi films on Si(100) and Si(111) substrates with a broad variation in their structures. By controlling the Mn thickness and annealing parameters, the pure MnSi phase of polycrystalline and textured nature as well as the mixed phase of MnSi and MnSi1.7 are obtained. Surprisingly, all these MnSi films show an increased Curie temperature of up to around 43 K. The Curie temperature is likely independent of the structural parameters within our accessibility including the film thickness above a threshold, strain, cell volume and the mixture with MnSi1.7. However, a pronounced phonon softening is observed for all samples, which can tentatively be attributed to slight Mn excess from stoichiometry, leading to the increased Curie temperature.

Involved external institutions

Helmholtz-Zentrum Dresden-Rossendorf (HZDR) DE Germany (DE) Technische Universität Dresden DE Germany (DE)

How to cite

APA:

Li, Z., Yuan, Y., Begeza, V., Rebohle, L., Helm, M., Nielsch, K.,... Zhou, S. (2022). On Curie temperature of B20-MnSi films. Scientific Reports, 12(1). https://dx.doi.org/10.1038/s41598-022-20483-2

MLA:

Li, Zichao, et al. "On Curie temperature of B20-MnSi films." Scientific Reports 12.1 (2022).

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