Conductivitylike Gilbert Damping due to Intraband Scattering in Epitaxial Iron

Confirming the origin of Gilbert damping by experiment has remained a challenge for many decades, even for simple ferromagnetic metals. Here, we experimentally identify Gilbert damping that increases with decreasing electronic scattering in epitaxial thin films of pure Fe. This observation of conduc...

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Published inPhysical review letters Vol. 124; no. 15; p. 157201
Main Authors Khodadadi, Behrouz, Rai, Anish, Sapkota, Arjun, Srivastava, Abhishek, Nepal, Bhuwan, Lim, Youngmin, Smith, David A, Mewes, Claudia, Budhathoki, Sujan, Hauser, Adam J, Gao, Min, Li, Jie-Fang, Viehland, Dwight D, Jiang, Zijian, Heremans, Jean J, Balachandran, Prasanna V, Mewes, Tim, Emori, Satoru
Format Journal Article
LanguageEnglish
Published United States 17.04.2020
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Summary:Confirming the origin of Gilbert damping by experiment has remained a challenge for many decades, even for simple ferromagnetic metals. Here, we experimentally identify Gilbert damping that increases with decreasing electronic scattering in epitaxial thin films of pure Fe. This observation of conductivitylike damping, which cannot be accounted for by classical eddy-current loss, is in excellent quantitative agreement with theoretical predictions of Gilbert damping due to intraband scattering. Our results resolve the long-standing question about a fundamental damping mechanism and offer hints for engineering low-loss magnetic metals for cryogenic spintronics and quantum devices.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.124.157201