Published May 30, 2007 | Version v1
Journal article Metadata-only

Spin-glass state induced by cobalt substitution in CaRuO3

Creators

  • 1. Laboratoire CRISMAT, UMR 6508 CNRS ENSICAEN, Boulevard du Marechal Juin, 14050 Caen Cedex 4 (France)
  • 2. National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu 30076, Taiwan (China)
  • 3. Chung Cheng Institute of Technology, National Defense University, Taoyuan 335, Taiwan (China)

Description

This paper reports on an experimental study of the effects induced by the substitution of Co for Ru in CaRuO3, a prototypical oxide close to a magnetic instability. The L2,3 x-ray absorption spectroscopy (XAS) spectra of Ru and Co in CaRu1-x CoxO3 reveal that Co is in a divalent state for low x values, while the Ru valence increases upon increasing the Co content. The dc and ac magnetic susceptibilities demonstrate that the CaRu1-xCoxO3 compounds can be classified as spin glasses. The origin of this behaviour and its implications are discussed. The effect of Co is also compared with the literature about substitutions by other cations in the magnetic sublattice of CaRuO3

Additional details

Identifiers

DOI
10.1088/0953-8984/19/21/216212;
PII
S0953-8984(07)40939-0;

Publishing Information

Journal Title
Journal of Physics. Condensed Matter
Journal Volume
19
Journal Issue
21
Journal Page Range
p. 216212
ISSN
0953-8984
CODEN
JCOMEL

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
38077801
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ABSORPTION SPECTRA; ABSORPTION SPECTROSCOPY; CATIONS; COBALT; COBALT OXIDES; CONCENTRATION RATIO; INSTABILITY; MAGNETIC SUSCEPTIBILITY; RUTHENIUM OXIDES; SPIN GLASS STATE; VALENCE; X-RAY SPECTRA; X-RAY SPECTROSCOPY
Descriptors DEC
CHALCOGENIDES; CHARGED PARTICLES; COBALT COMPOUNDS; DIMENSIONLESS NUMBERS; ELEMENTS; IONS; MAGNETIC PROPERTIES; METALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; REFRACTORY METAL COMPOUNDS; RUTHENIUM COMPOUNDS; SPECTRA; SPECTROSCOPY; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS