Suppression of the gamma-alpha structural phase transition in Ce0.8La0.1Th0.1 by large magnetic fields

ORAL

Abstract

The $\gamma -\alpha $ transition in Ce$_{0.8}$La$_{0.1}$Th$_{0.1 }$is measured as a function of applied magnetic field using both resistivity and magnetization. The $\gamma -\alpha $ transition temperature decreases with increasing magnetic field, reaching zero temperature at approximately 56 T. The magnetic-field dependence of the transition of the transition temperature may be fitted using a model that invokes the field and temperature dependence of the entropy of the 4f-electron moments of the $\gamma $-phase, suggesting that the volume collapse in cerium and its alloys is primarily driven by entropic considerations. We thank DOE-LDRD-DR20030084, NSF-DMR-0433560, DOE-DE-FG03-03NA00066 and the State of Florida for support of this research.

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Authors

  • John Singleton

  • Fivos Drymiotis

  • Neil Harrison

    • Los Alamos National Laboratory, Los Alamos, NM87545, USA

  • Luis Balicas

    • National High Magnetic Field Laboratory, Tallahassee, FL32310, USA

  • Alimamy Bangura

    • The Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom

  • Jason Lashley

  • Chuck Mielke

    • Los Alamos National Laboratory, Los Alamos, NM, 87545, USA

  • Zachary Fisk

    • Department of Physics, University of California, Davis, CA95616, USA

  • Albert Migliori

  • James Smith

    • Los Alamos National Laboratory, Los Alamos, NM87545, USA