Pressure effects on crystal structure, magnetic and transport properties of layered perovskite TbBaCo2O5.5
Creators
- 1. Laboratory for Neutron Scattering, ETHZ and PSI, CH-5232 Villigen PSI (Switzerland)
- 2. Laboratory for Developments and Methods, Paul Scherrer Institut, CH-5232 Villigen PSI (Switzerland)
- 3. Institute for Metal Physics RAS, 620219 Ekaterinburg GSP-170 (Russian Federation)
- 4. II. Physikalisches Institut, Universitaet zu Koeln, Zuelpicherstr. 77, 50937 Cologne (Germany)
Description
The complex behavior of the RBaCo2O5.5 perovskites, which include a metal-insulator (MI) as well as successive magnetic (PM->FM->AFM) transitions, is suggested to be related to an interplay between spin, charge and orbital degrees of freedom of the Co3+ ions. We have investigated the effect of pressure on the structural, magnetic and electronic properties of TbBaCo2O5.5 by means of neutron powder diffraction (p=1.2GPa), magnetization (p=1.2GPa), and resistivity measurements (p=2.6GPa), respectively. Contrary to the results reported on conventional (La,Sr)CoO3 perovskites, we find that the pressure coefficients of the transition temperatures TN, TC, as well as TMI are rather small (<1K/GPa), suggesting a weak change of the spin states at the MI transition. We further show, that pressure and temperature have different effects on the volumes of the CoO6 octahedron and CoO5 pyramid in the layered double-perovskite
Additional details
Identifiers
- DOI
- 10.1016/j.physb.2006.01.405;
- PII
- S0921-4526(06)00258-4;
Publishing Information
- Journal Title
- Physica. B, Condensed Matter
- Journal Volume
- 378-380
- Journal Page Range
- p. 537-538
- ISSN
- 0921-4526
- CODEN
- PHYBE3
Conference
- Title
- International conference on strongly correlated electron systems
- Acronym
- SCES 2005
- Dates
- 26-30 Jul 2005
- Place
- Vienna (Austria)
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38070310
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- COBALT IONS; COBALT OXIDES; CRYSTAL STRUCTURE; DEGREES OF FREEDOM; ELECTRIC CONDUCTIVITY; MAGNETIZATION; NEUTRON DIFFRACTION; PEROVSKITE; PHASE TRANSFORMATIONS; PRESSURE COEFFICIENT; PRESSURE DEPENDENCE; PRESSURE RANGE GIGA PA; SPIN; TEMPERATURE DEPENDENCE; TERBIUM COMPOUNDS; TRANSITION TEMPERATURE
- Descriptors DEC
- ANGULAR MOMENTUM; CHALCOGENIDES; CHARGED PARTICLES; COBALT COMPOUNDS; COHERENT SCATTERING; DIFFRACTION; ELECTRICAL PROPERTIES; IONS; MINERALS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; PARTICLE PROPERTIES; PEROVSKITES; PHYSICAL PROPERTIES; PRESSURE RANGE; RARE EARTH COMPOUNDS; REACTIVITY COEFFICIENTS; SCATTERING; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.