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Entropy change and magnetocaloric effect in Gd5(SixGe1-x)4

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  • Additional Information
    • Publication Information:
      The American Physical Society
    • Publication Date:
      2002
    • Collection:
      Dipòsit Digital de la Universitat de Barcelona
    • Abstract:
      Isothermal magnetization curves up to 23 T have been measured in Gd5Si1.8Ge2.2. We show that the values of the entropy change at the first-order magnetostructural transition, obtained from the Clausius-Clapeyron equation and the Maxwell relation, are coincident, provided the Maxwell relation is evaluated only within the transition region and the maximum applied field is high enough to complete the transition. These values are also in agreement with the entropy change obtained from differential scanning calorimetry. We also show that a simple phenomenological model based on the temperature and field dependence of the magnetization accounts for these results.
    • File Description:
      4 p.; application/pdf
    • ISSN:
      0163-1829
    • Relation:
      Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.66.100401; Physical Review B, 2002, vol. 66, núm. , p. 100401(1)-100401(4); http://dx.doi.org/10.1103/PhysRevB.66.100401; http://hdl.handle.net/2445/10523; 504141
    • Online Access:
      http://hdl.handle.net/2445/10523
    • Rights:
      (c) The American Physical Society, 2002 ; info:eu-repo/semantics/openAccess
    • Accession Number:
      edsbas.2551305D