2009, English, Article edition: Structure, magnetic and electrical properties of CeIrSb and its hydride CeIrSbH 0.8 Gaudin, Etienne; Chevalier, Bernard; Hermes, Wilfried; ...

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Physical Description
  • text
Published
  • HAL - CCSD
  • 2009
Language
  • English

Edition details

Title
  • Structure, magnetic and electrical properties of CeIrSb and its hydride CeIrSbH 0.8
Author
  • Gaudin, Etienne
  • Chevalier, Bernard
  • Hermes, Wilfried
  • Rodewald, Ute Ch.
  • Pöttgen, Rainer
Published
  • HAL - CCSD
  • 2009
Physical Description
  • text
Subjects
Notes
  • The ternary antimonide CeIrSb absorbs hydrogen under moderate temperature and pressure conditions (4 MPa and 573 K), leading to the hydride CeIrSbH 0.8 . The crystal structures of both compounds have been investigated by X-ray diffraction on powders and single crystals: TiNiSi type, space group Pnma , a =​735.07(7), b =​456.93(4), c =​792.8(1) pm, R 1/​w R 2=​0.0206/​0.0395, 601 F 2 values for CeIrSb and a =​728.16(14), b =​460.35(6), c =​825.87(2) pm, R 1/​w R 2=​0.0322/​0.0735, 528 F 2 values for CeIrSbH 0.8 with 20 variables per refinement. Hydrogenation induces both an increase of the cell volume V (+4%) and a strongly anisotropic expansion of the unit cell with a maximum of 4.3% in the c direction, leading to a significant increase of the Ce–Ir and Ce–Ce distances in this direction. The H-insertion into CeIrSb leads to a magnetic transition from intermediate valence to antiferromagnetic behavior ( T N =​7.0 K) evidenced by magnetization, electrical resistivity and specific heat measurements. This transition can be explained on the basis of the Doniach diagram considering the J cf interaction between the 4 f (Ce) and conduction electrons.
  • HAL:hal-00406973, version 1
  • HAL:http:/​/​hal.archives-ouvertes.fr/​hal-00406973/​en/​
  • DOI:10.1016/​j.jssc.2009.04.031
Language
  • English
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