Field-temperature phase diagram and entropy landscape of CeAuSb2

Date
2016-05-15
Authors
Zhao, Lishan
Yelland, Edward
Bruin, Jan
Canfield, Paul
Sheikin, Ilya
Canfield, Paul
Fritsch, Veronika
Sakai, Hideaki
Mackenzie, Andrew
Hicks, Clifford
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Ames Laboratory
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Physics and Astronomy
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Ames LaboratoryPhysics and Astronomy
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 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 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.

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This article is from Phys. Rev. B 93, 195124, doi:10.1103/PhysRevB.93.195124. Posted with permission.

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