Electron spin resonance of Eu 2 + in the Eu doped clathrate Ba 6 Ge 25

J. Sichelschmidt (), W. Carrillo-Cabrera, V. A. Ivanshin, Yu. Grin and F. Steglich

The European Physical Journal B: Condensed Matter and Complex Systems, 2005, vol. 46, issue 2, 201-205

Abstract: We report electron spin resonance (ESR) investigations of the clathrate compound Ba 6-x Eu x Ge 25 (x=0.03–0.4) which exhibits a temperature induced, two-step reconstructive structure transformation at temperatures between 185 K and 223 K. The linewidth of the Eu 2+ ESR proves to be sensitive to the transformation. Another anomaly in the temperature dependence of the linewidth is found near T=60 K which points towards another possible structural transition. Both anomalies seen in the ESR linewidth are not sensitive to the Eu content in contrast to the strong Eu-concentration dependence of transport properties. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Date: 2005
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DOI: 10.1140/epjb/e2005-00246-8

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