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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Bibliographic Details
Published in:	Physical 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
Language:	English
Published:	United States American Physical Society 17-04-2020
Subjects:	Current loss Damping Eddy current testing Eddy currents Ferromagnetism Iron Scattering Spintronics Thin films
Online Access:	Get full text
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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.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.124.157201