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Title: 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:
 [1];  [1];  [2];  [3];  [3];  [4]
  1. University of Bristol, UK
  2. University of Tennessee, Knoxville (UTK)
  3. ORNL
  4. 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}
}