Published November 1, 2002 | Version v1
Journal article Metadata-only

Spin-state ordered clusters in the perovskite NdBaCo2O5.47

Creators

  • 1. European Synchrotron Radiation Facility, 6, Rue Jules Horowitz, B.P. 220, 38043 Grenoble Cedex (France)
  • 2. Institut Laue Langevin, 6, Rue Jules Horowitz, B.P. 156X, 38042 Grenoble Cedex 9 (France)
  • 3. Laboratoire CRISMAT/ISMRA, Bd. du Mal Juin, 14050 Caen Cedex (France)
  • 4. Laboratoire Leon Brillouin, CEA-Saclay, 91191 Gif-sur-Yvette (France)

Description

NdBaCo2O5.47 cobaltite has been investigated using neutron and synchrotron powder diffraction. At TMI∼360 K, the compound exhibits an associated metal-insulator and spin-state transition commonly observed in these systems. At TN∼275 K, the IS-Co3+ species order in a AFM G-type structure. At TSSO∼230 K, the AFM G-type volume fraction is gradually transformed into spin-state ordered clusters having a distinct magnetic structure. These clusters result from a selective IS-Co3+ (t2g5eg1) to LS-CoIII (t2g6eg0) crossover and the ordering of the diamagnetic ions over ∼350 A correlation lengths. The same electronic phase segregation is observed in TbBaCo2O5.46 and seems to occur only for a narrow range of oxygen stoichiometry

Additional details

Identifiers

DOI
10.1103/PhysRevB.66.184421;

Publishing Information

Journal Title
Physical Review. B, Condensed Matter and Materials Physics
Journal Volume
66
Journal Issue
18
Journal Page Range
p. 184421-184421.5
ISSN
1098-0121

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
36001368
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
Descriptors DEI
ANTIFERROMAGNETIC MATERIALS; BARIUM COMPOUNDS; COBALT COMPOUNDS; COBALT IONS; NEODYMIUM COMPOUNDS; NEUTRON DIFFRACTION; OXIDES; OXYGEN; PEROVSKITE; SEGREGATION; SPIN; STOICHIOMETRY; SYNCHROTRON RADIATION; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K; TERBIUM COMPOUNDS; X-RAY DIFFRACTION
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; ANGULAR MOMENTUM; BREMSSTRAHLUNG; CHALCOGENIDES; CHARGED PARTICLES; COHERENT SCATTERING; DIFFRACTION; ELECTROMAGNETIC RADIATION; ELEMENTS; IONS; MAGNETIC MATERIALS; MATERIALS; MINERALS; NONMETALS; OXIDE MINERALS; OXYGEN COMPOUNDS; PARTICLE PROPERTIES; PEROVSKITES; RADIATIONS; RARE EARTH COMPOUNDS; SCATTERING; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
(c) 2002 The American Physical Society