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Title: Thermodynamics of the ferromagnetic phase transition in nearly half metallic CoS2 at high pressures

The volume change and heat capacity at the ferromagnetic phase transition in COS2 were measured at high pressures using X-rays generated by the Argonne synchrotron light source and by ac-calorimetry, respectively. The transition entropy, calculated on the basis of these experimental data, drops along the transition line due to quantum degradation, as required by Nernst's law. The volume change increases strongly along the transition line, which is explained by specifics of the compressibility difference of coexisting phases that results from nearly half metallic nature of the ferromagnetic phase of COS2. (C) 2013 Elsevier Ltd. All rights reserved.
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  1. Institute for High Pressure Physics of Russian Academy of Sciences
  2. Institute for Solid State Physics Russian Academy of Sciences
  3. Ames Laboratory
  4. Los Alamos National Laboratory
Publication Date:
OSTI Identifier:
Report Number(s):
IS-J 8274
Journal ID: ISSN 0038-1098
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Solid State Communications; Journal Volume: 181
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
36 MATERIALS SCIENCE; ELECTRICAL-RESISTIVITY, Half-metal, phase transition, pyrite structure, specific heat, x-ray