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Title: Field-temperature phase diagram and entropy landscape of CeAuSb 2

Here, 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 end points 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 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.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [1] ;  [8]
  1. Univ. of St. Andrews, St. Andrews (United Kingdom); Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)
  2. Univ. of St. Andrews, St. Andrews (United Kingdom); Univ. of Edinburgh, Edinburgh (United Kingdom)
  3. Univ. of St. Andrews, St. Andrews (United Kingdom); Max Planck Institute for Solid State Research, Stuttgart (Germany)
  4. Lab. National des Champs Magnetiques Intenses (LNCMI-EMFL), CNRS, UJF, Grenoble (France)
  5. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  6. Univ. of Augsburg, Augsburg (Germany); Karlsruhe Institute of Technology, Karlsruhe (Germany)
  7. Univ. of St. Andrews, St. Andrews (United Kingdom); Osaka Univ., Osaka (Japan)
  8. Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)
Publication Date:
Report Number(s):
IS-J-9016
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:
EP/1031014/1; EP/G03673X/1; AC02-07CH11358; 960
Type:
Published Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 19; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1253021
Alternate Identifier(s):
OSTI ID: 1278785

Zhao, Lishan, Yelland, Edward A., Bruin, Jan A. N., 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. United States: N. p., Web. doi:10.1103/PhysRevB.93.195124.
Zhao, Lishan, Yelland, Edward A., Bruin, Jan A. N., Sheikin, Ilya, Canfield, Paul C., Fritsch, Veronika, Sakai, Hideaki, Mackenzie, Andrew P., & Hicks, Clifford W.. Field-temperature phase diagram and entropy landscape of CeAuSb2. United States. doi:10.1103/PhysRevB.93.195124.
Zhao, Lishan, Yelland, Edward A., Bruin, Jan A. N., Sheikin, Ilya, Canfield, Paul C., Fritsch, Veronika, Sakai, Hideaki, Mackenzie, Andrew P., and Hicks, Clifford W.. 2016. "Field-temperature phase diagram and entropy landscape of CeAuSb2". United States. doi:10.1103/PhysRevB.93.195124.
@article{osti_1253021,
title = {Field-temperature phase diagram and entropy landscape of CeAuSb2},
author = {Zhao, Lishan and Yelland, Edward A. and Bruin, Jan A. N. and Sheikin, Ilya and Canfield, Paul C. and Fritsch, Veronika and Sakai, Hideaki and Mackenzie, Andrew P. and Hicks, Clifford W.},
abstractNote = {Here, 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 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.},
doi = {10.1103/PhysRevB.93.195124},
journal = {Physical Review B},
number = 19,
volume = 93,
place = {United States},
year = {2016},
month = {5}
}