Electron spin resonance investigation of the Heavy-Fermion compound CeCu2(Si1−x Ge x )2 |
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| Authors: | H. A. Krug von Nidda A. Schütz M. Heil B. Elschner A. Loidl |
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| Affiliation: | 1. Institut für Festk?rperphysik, Technische Hochschule Darmstadt, Hochschulstra?e 6, D-64289, Darmstadt, Germany
2. Experimentalphysik V, Universit?t Augsburg, Augsburg, Germany
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| Abstract: | The Kondo-lattice system CeCu2(Si1?x Ge x )2 exhibits an alloying induced transition from a coherent Fermi-liquid (x=0) with strongly enhanced effective masses to an antiferromagnetically ordered heavy-fermion system (x=1). This transition is studied by Gd3+ ESR in oriented powder samples. The temperature dependence of the ESR line width follows a characteristic pattern which allows one to distinguish between the different ground states. The results obtained in polycrystalline CeCu2Si2 are in good agreement with the measurements performed in single crystals. Finally we compare our results with63Cu-NMR data obtained from CeCu2Si2 and CeCu2Ge2. |
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