Field-temperature phase diagram and entropy landscape of CeAuSb2

Lishan Zhao, Edward A. Yelland, Jan A. N. Bruin, Ilya Sheikin, Paul C. Canfield, Veronika Fritsch, Hideaki Sakai, Andrew P. Mackenzie, Clifford W. Hicks

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

We report a field-temperature phase diagram and an entropy map for the heavy fermion compound CeAuSb2. CeAuSb2 orders antiferromagnetically below TN=6.6 K, and has two metamagnetic transitions, at 2.8 and 5.6 T. The locations of the critical endpoints of the metamagnetic transitions, which may play a strong role in the putative quantum criticality of CeAuSb2 and related compounds, are identified. The entropy map reveals an apparent entropy balance with Fermi liquid behavior, implying that above the Néel transition the Ce moments are incorporated into the Fermi liquid. High-field data showing that the magnetic behavior is remarkably anisotropic are also reported.
Original languageEnglish
Article number195124
Number of pages7
JournalPhysical Review. B, Condensed matter and materials physics
Volume93
DOIs
Publication statusPublished - 12 May 2016

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