Volume 63, Number 3, August 2003
|Page(s)||446 - 452|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 November 2003|
Anomalous temperature dependence of the ESR linewidth in doped with magnetic impurities and the universal relations in the Oshikawa-Affleck theory
General Physics Institute of RAS - Vavilov str., 38, 119991 Moscow, Russia
2 Kobe University - 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
Accepted: 23 May 2003
Studying the ESR line in doped with , , and impurities we find that magnetic impurities cause the anomalous low-temperature increase of the linewidth (where denotes the resonant field) accompanied by the temperature-dependent g-factor shift . For , these parameters are strongly correlated and the ratio follows the general relation . The observed effects agree with the predictions of the theory of ESR developed by Oshikawa and Affleck for 1D antiferromagnetic chains.
PACS: 76.30.-v – Electron paramagnetic resonance and relaxation / 76.30.Fc – Iron group () ions and impurities (–)
© EDP Sciences, 2003
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