Direct Observation of Paramagnons in Palladium
Abstract
We report an inelastic neutron scattering study of the spin fluctuations in the nearly ferromagnetic element palladium. Dispersive over-damped collective magnetic excitations or 'paramagnons' are observed up to 128 meV. We analyze our results in terms of a Moriya-Lonzarich-type spin-fluctuation model and estimate the contribution of the spin fluctuations to the low-temperature heat capacity. In spite of the paramagnon excitations being relatively strong, their relaxation rates are large. This leads to a small contribution to the low-temperature electronic specific heat.
- Authors:
-
- University of Bristol, UK
- University of Tennessee, Knoxville (UTK)
- ORNL
- ISIS Facility, Rutherford Appleton Laboratory
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1008827
- DOE Contract Number:
- DE-AC05-00OR22725
- Resource Type:
- Journal Article
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 105; Journal Issue: 2; Journal ID: ISSN 0031--9007
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ELECTRONIC SPECIFIC HEAT; FLUCTUATIONS; NEUTRONS; PALLADIUM; RELAXATION; SCATTERING; SPECIFIC HEAT; SPIN
Citation Formats
Doubble, R., Hayden, S M., Dai, Pengcheng, Mook, Jr, Herbert A, Thompson, James R, and Frost, C. Direct Observation of Paramagnons in Palladium. United States: N. p., 2010.
Web. doi:10.1103/PhysRevLett.105.027207.
Doubble, R., Hayden, S M., Dai, Pengcheng, Mook, Jr, Herbert A, Thompson, James R, & Frost, C. Direct Observation of Paramagnons in Palladium. United States. https://doi.org/10.1103/PhysRevLett.105.027207
Doubble, R., Hayden, S M., Dai, Pengcheng, Mook, Jr, Herbert A, Thompson, James R, and Frost, C. 2010.
"Direct Observation of Paramagnons in Palladium". United States. https://doi.org/10.1103/PhysRevLett.105.027207.
@article{osti_1008827,
title = {Direct Observation of Paramagnons in Palladium},
author = {Doubble, R. and Hayden, S M. and Dai, Pengcheng and Mook, Jr, Herbert A and Thompson, James R and Frost, C.},
abstractNote = {We report an inelastic neutron scattering study of the spin fluctuations in the nearly ferromagnetic element palladium. Dispersive over-damped collective magnetic excitations or 'paramagnons' are observed up to 128 meV. We analyze our results in terms of a Moriya-Lonzarich-type spin-fluctuation model and estimate the contribution of the spin fluctuations to the low-temperature heat capacity. In spite of the paramagnon excitations being relatively strong, their relaxation rates are large. This leads to a small contribution to the low-temperature electronic specific heat.},
doi = {10.1103/PhysRevLett.105.027207},
url = {https://www.osti.gov/biblio/1008827},
journal = {Physical Review Letters},
issn = {0031--9007},
number = 2,
volume = 105,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2010},
month = {Fri Jan 01 00:00:00 EST 2010}
}
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