Field-Temperature Phase Diagram and Entropy Landscape of CeAuSb$_2$

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

doi:10.1103/PhysRevB.93.195124

Field-Temperature Phase Diagram and Entropy Landscape of CeAuSb$_2$

Strongly Correlated Electrons 2016-05-18 v1

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

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Abstract

We report a field-temperature phase diagram and an entropy map for the heavy fermion compound CeAuSb $_2$ . CeAuSb $_2$ 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 endpoints of the metamagnetic transitions, which may play a strong role in the putative quantum criticality of CeAuSb $_2$ and related compounds, are identified. The entropy map reveals an apparent entropy balance with Fermi liquid behavior, implying that above the N\'{e}el transition the Ce moments are incorporated into the Fermi liquid. High-field data showing that the magnetic behavior is remarkably anisotropic are also reported.

Keywords

heavy fermion compound CeAuSb$_2$ field-temperature phase diagram metamagnetic transition entropy landscape quantum criticality Fermi liquid magnetic anisotropy

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@article{arxiv.1602.06742,
  title  = {Field-Temperature Phase Diagram and Entropy Landscape of CeAuSb$_2$},
  author = {Lishan Zhao and Edward A. Yelland and Jan A. N. Bruin and Ilya Sheikin and Paul C. Canfield and Veronika Fritsch and Hideaki Sakai and Andrew P. Mackenzie and Clifford W. Hicks},
  journal= {arXiv preprint arXiv:1602.06742},
  year   = {2016}
}

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7 pages, 9 figures

Field-Temperature Phase Diagram and Entropy Landscape of CeAuSb$_2$

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