Field-temperature phase diagram and entropy landscape ofCeAuSb2

2016/02/22 by Lishan Zhao, Edward A. Yelland, Jan A. N. Bruin +11 · 22 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Entropy (arrow of time) #Fermi liquid theory #Iron-based superconductors research #Magnetic and transport properties of perovskites and related materials #Phase (matter) #Phase diagram #Phase transition #Physics #Quantum mechanics #Rare-earth and actinide compounds #Superconductivity #Thermodynamics #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.93.195124

published in Physical review. B./Physical review. B 93(19) (American Physical Society) · 7 pages, 9 figures

arxiv created 2016/02/22 · openalex publication_date 2016/05/12 · arxiv updated 2016/05/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

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 N'eel transition the Ce moments are incorporated into the Fermi liquid. High-field data showing that the magnetic behavior is remarkably anisotropic are also reported.

Citations

• Pressure effects on the heavy-fermion antiferromagnet CeAuSb2
• Tuning low-temperature physical properties ofCeNiGe3by magnetic field
• Fermi surface instabilities in CeRh2Si2 at high magnetic field and pressure
• Ferromagnetic Quantum Critical Fluctuations inYbRh2(Si0.95Ge0.05)2

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