Journal
PHYSICAL REVIEW LETTERS
Volume 124, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.124.157201
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Funding
- 4-VA, a collaborative partnership for advancing the Commonwealth of Virginia
- ICTAS Junior Faculty Award
- NSF-CAREER Award [1452670]
- DARPA TEE Award [D18AP00011]
- NASA Award [CAN80NSSC18M0023]
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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.
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