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Field-temperature phase diagram and entropy landscape of CeAuSb2

TitleField-temperature phase diagram and entropy landscape of CeAuSb2
Publication TypeJournal Article
Year of Publication2016
AuthorsZhao, LS, Yelland, EA, Bruin, JAN, Sheikin, I, Canfield, PC, Fritsch, V, Sakai, H, Mackenzie, AP, Hicks, CW
JournalPhysical Review B
Date Published05
Type of ArticleArticle
ISBN Number2469-9950
Accession NumberWOS:000375994600002
Keywordsalloys, cerh2si2, ceru2si2, growth, magnetic-properties, physics, pressure-induced superconductivity, quantum criticality, single-crystals, transition

We report a field-temperature phase diagram and an entropy map for the heavy-fermion compound CeAuSb2. CeAuSb2 orders antiferromagnetically below T-N = 6.6 K and has two metamagnetic transitions, at 2.8 and 5.6 T. The locations of the critical end points 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 Neel transition the Ce moments are incorporated into the Fermi liquid. High-field data showing that the magnetic behavior is remarkably anisotropic are also reported.

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Complex States

Alternate JournalPhys. Rev. B