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Percolation limited magnetic order in Eu1-xCaxB6

Wigger, G. A. ; Felder, E. ; Weller, M. ; Streule, S. ; Ott, H. R. ; Bianchi, A. D. ; Fisk, Z.

In: The European Physical Journal B - Condensed Matter and Complex Systems, 2005, vol. 46, no. 2, p. 231-235

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    Titre
    • Percolation limited magnetic order in Eu1-xCaxB6
    Auteur
    • Wigger, G. A.. Laboratorium für Festkörperphysik, ETH-Hönggerberg, 8093, Zürich, Switzerland
    • Felder, E.. Laboratorium für Festkörperphysik, ETH-Hönggerberg, 8093, Zürich, Switzerland
    • Weller, M.. Laboratorium für Festkörperphysik, ETH-Hönggerberg, 8093, Zürich, Switzerland
    • Streule, S.. Laboratorium für Festkörperphysik, ETH-Hönggerberg, 8093, Zürich, Switzerland
    • Ott, H. R.. Laboratorium für Festkörperphysik, ETH-Hönggerberg, 8093, Zürich, Switzerland
    • Bianchi, A. D.. National High Magnetic Field Laboratory, Florida State University, 32306, Tallahassee, Florida, USA
    • Fisk, Z.. Department of Physics, University of California - Davis, 95616, Davis, CA, USA
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • The European Physical Journal B - Condensed Matter and Complex Systems, 2005, vol. 46, no. 2, p. 231-235. EDP Sciences
    Autre version électronique
    Classification
    • Physique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:322461
    Summary
    Abstract.: We report the results of measurements of the low-temperature specific heat Cp(T) and the ac susceptibility χac(T) in low applied magnetic fields for a series of samples of Eu1-xCaxB6. The anomalies in Cp(T), together with the results for χac(T) and M(H), confirm the onset of phase transitions to long range magnetic order for x < 0.7 and provide evidence that for x ≥ 0.7, the Eu moments, which are captured in large magnetic clusters with magnetic moments of the order of 260 μB, adopt a spin-glass type ground state. The data set allows to establish the low-temperature [ T,x] phase diagram of this alloy series