Are ESR lines in spin glasses exchange narrowed?

By using the Kubo-Tomita formalism, we calculated the concentration and frequency dependence of the exchange narrowed dipolar broadened resonance linewidth and shift at high temperatures. We find the linewidth varies as the square root of the magnetic impurity concentration which is in good agreemen...

Full description

Saved in:
Bibliographic Details
Published inJournal of magnetism and magnetic materials Vol. 54; pp. 181 - 182
Main Authors Levy, P.M., Raghavan, R.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 1986
Online AccessGet full text

Cover

More Information
Summary:By using the Kubo-Tomita formalism, we calculated the concentration and frequency dependence of the exchange narrowed dipolar broadened resonance linewidth and shift at high temperatures. We find the linewidth varies as the square root of the magnetic impurity concentration which is in good agreement with recent data. While at low frequencies the line is in the limit of extreme exchange narrowing, we find at high frequencies, 35 GHz, the 10/3 effect is no longer operative.
ISSN:0304-8853
DOI:10.1016/0304-8853(86)90541-X