Anomalous temperature dependence of the ESR linewidth in CuGeO3 doped with magnetic impurities and the universal relations in the Oshikawa-Affleck theory

S. V. Demishev, Yuji Inagaki, H. Ohta, S. Okubo, Y. Oshima, A. A. Pronin, N. A. Samarin, A. V. Semeno, N. E. Sluchanko

Research output: Contribution to journalArticle

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Abstract

Studying the ESR line in CuGeO3 doped with Ti, Fe, and Co impurities we find that magnetic impurities cause the anomalous low-temperature increase of the linewidth w(T) ∼ (Bres/T)2 (where Bres denotes the resonant field) accompanied by the temperature-dependent g-factor shift Δg(T). For T < 20 K, these parameters are strongly correlated and the ratio w(T)/Δg(T) follows the general relation w(T)/Δg(T) ∼ kBT/μB. The observed effects agree with the predictions of the theory of ESR developed by Oshikawa and Affleck for 1D S = 1/2 antiferromagnetic chains.

Original languageEnglish
Pages (from-to)446-452
Number of pages7
JournalEurophysics Letters
Volume63
Issue number3
DOIs
Publication statusPublished - Aug 2003
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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Anomalous temperature dependence of the ESR linewidth in CuGeO3 doped with magnetic impurities and the universal relations in the Oshikawa-Affleck theory. / Demishev, S. V.; Inagaki, Yuji; Ohta, H.; Okubo, S.; Oshima, Y.; Pronin, A. A.; Samarin, N. A.; Semeno, A. V.; Sluchanko, N. E.

In: Europhysics Letters, Vol. 63, No. 3, 08.2003, p. 446-452.

Research output: Contribution to journalArticle

Demishev, S. V. ; Inagaki, Yuji ; Ohta, H. ; Okubo, S. ; Oshima, Y. ; Pronin, A. A. ; Samarin, N. A. ; Semeno, A. V. ; Sluchanko, N. E. / Anomalous temperature dependence of the ESR linewidth in CuGeO3 doped with magnetic impurities and the universal relations in the Oshikawa-Affleck theory. In: Europhysics Letters. 2003 ; Vol. 63, No. 3. pp. 446-452.
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AU - Demishev, S. V.

AU - Inagaki, Yuji

AU - Ohta, H.

AU - Okubo, S.

AU - Oshima, Y.

AU - Pronin, A. A.

AU - Samarin, N. A.

AU - Semeno, A. V.

AU - Sluchanko, N. E.

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AB - Studying the ESR line in CuGeO3 doped with Ti, Fe, and Co impurities we find that magnetic impurities cause the anomalous low-temperature increase of the linewidth w(T) ∼ (Bres/T)2 (where Bres denotes the resonant field) accompanied by the temperature-dependent g-factor shift Δg(T). For T < 20 K, these parameters are strongly correlated and the ratio w(T)/Δg(T) follows the general relation w(T)/Δg(T) ∼ kBT/μB. The observed effects agree with the predictions of the theory of ESR developed by Oshikawa and Affleck for 1D S = 1/2 antiferromagnetic chains.

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