Department of Physics and Astronomy: Individual Faculty Pages
Roger Kirby Publications
Accessibility Remediation
If you are unable to use this item in its current form due to accessibility barriers, you may request remediation through our remediation request form.
Document Type
Article
Date of this Version
April 1999
Abstract
Starting from an exact quantum-statistical description, the influence of the shape of the energy landscape on the magnetic viscosity is investigated. Magnetic phase-space analysis based on Kramers’ escape-rate theory of chemical reaction kinetics theory shows that the activation entropy associated with thermally activated hopping modifies the magnetic viscosity by reducing the attempt-frequency prefactor compared to an earlier prediction by Brown [W. F. Brown, Phys. Rev. 130, 1677 (1963)]. Energetic contributions are analyzed in terms of a model applicable to a range of coherent and noncoherent magnetization processes, and in the long-time limit deviations from the linear logarithmic magnetic-viscosity law are found.
Comments
Published in Journal of Applied Physics, 85:8 (April 15, 1999), 5069-5071. DOI: 10.1063/1.370093
Copyright © 1999 The American Institute of Physics. Used by permission.
Journal website = http://jap.aip.org/