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Room-temperature helimagnetism in FeGe thin films

Zhang, S. L.; Stasinopoulos, I.; Lancaster, T.; Xiao, F.; Bauer, A.; Rucker, F.; Baker, A. A.; Figueroa, A. I.; Salman, Z.; Pratt, F. L.; Blundell, S. J.; Prokscha, T.; Suter, A.; Waizner, J.; Garst, Markus; Grundler, D.; van der Laan, G.; Pfleiderer, C.; Hesjedal, T.

Chiral magnets are promising materials for the realisation of high-density and low-power spintronic memory devices. For these future applications, a key requirement is the synthesis of appropriate materials in the form of thin films ordering well above room temperature. Driven by the Dzyaloshinskii-Moriya interaction, the cubic compound FeGe exhibits helimagnetism with a relatively high transition temperature of 278 K in bulk crystals. We demonstrate that this temperature can be enhanced significantly in thin films. Using x-ray scattering and ferromagnetic resonance techniques, we provide unambiguous experimental evidence for long-wavelength helimagnetic order at room temperature and magnetic properties similar to the bulk material. We obtain α$_{intr}$ = 0.0036 ± 0.0003 at 310 K for the intrinsic damping parameter. We probe the dynamics of the system by means of muon-spin rotation, indicating that the ground state is reached via a freezing out of slow dynamics. Our work paves the way towards the fabrication of thin films of chiral magnets that host certain spin whirls, so-called skyrmions, at room temperature and potentially offer integrability into modern electronics.

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DOI: 10.1038/s41598-017-00201-z
Zitationen: 18
Web of Science
Zitationen: 19
Zitationen: 22
Zugehörige Institution(en) am KIT Institut für Theoretische Festkörperphysik (TFP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2017
Sprache Englisch
Identifikator ISSN: 2045-2322
KITopen-ID: 1000128936
Erschienen in Scientific reports
Verlag Nature Research
Band 7
Heft 1
Seiten Art.-Nr.: 123
Vorab online veröffentlicht am 09.03.2017
Nachgewiesen in Scopus
Web of Science
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