Physics and Astronomy, Ames Laboratory
Journal or Book Title
Physical Review B
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.
This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Zhao, Lishan; Yelland, Edward A.; Bruin, Jan A.; Sheikin, Ilya; Canfield, Paul C.; Fritsch, Veronika; Sakai, Hideaki; Mackenzie, Andrew P.; and Hicks, Clifford W., "Field-temperature phase diagram and entropy landscape of CeAuSb2" (2016). Ames Laboratory Publications. 393.