Magnetic resonance in the spin-glass (LaGd)Al2

M. Zomack, K. Baberschke, S. E. Barnes

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

ESR has been measured in the spin-glass (La1-xGdx)Al2, 1x15 at.% for 1, 3, 9, and 35 GHz, corresponding to different applied magnetic fields and in the temperature range of 100 mK to 30 K. The comparison of data for different frequencies shows that the linewidth depends very much on the frequency and/or field and therefore the temperature Tmin of the linewidth minimum is not an intrinsic parameter and the shift of the resonance position is almost independent of frequency. The former effect is analyzed and theoretically explained in terms of the temperature dependence of the measured susceptibility at the field for resonance instead of a Curie-Weiss susceptibility. When the resonance position does shift, close to the glass temperature, this is identified to be an internal-field, rather than a g-factor, effect. The temperature dependence of this internal field differs from that of the bulk magnetization.

Original languageEnglish (US)
Pages (from-to)4135-4148
Number of pages14
JournalPhysical Review B
Volume27
Issue number7
DOIs
StatePublished - Jan 1 1983

ASJC Scopus subject areas

  • Condensed Matter Physics

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