Low-dimensional magnetic ordering and Ising- and XY-like anisotropy of Er/sup 3+/ in the system ErBa/sub 2/Cu/sub 3/O/sub x/ with 6<7
Magnetic ordering of Er/sup 3+/ ions in ErBa/sub 2/Cu/sub 8/O/sub x/ with 6.12less than or equal toxless than or equal to6.91 has been studied for both orthorhombic and tetragonal phases by means of magnetic-susceptibility and heat-capacity measurements. Superconductivity in the orthorhombic phase samples was confirmed by the onset of a diamagnetic susceptibility. The superconducting transition temperature T/sub c/ was observed to decrease from 92 to 55 K as x was reduced from 6.91 to 6.31. The tetragonal samples with x = 6.23 and 6.12 remained paramagnetic down to 1.2 K and showed no overt trace of diamagnetism. The states of Er/sup 3+/ ions in ErBa/sub 2/Cu/sub 3/O/sub 6/ and ErBa/sub 2/Cu/sub 3/O/sub 7/ were calculated by means of crystalline electric field (CEF) theory using both a point-charge model and scaled inelastic neutron scattering results for HoBa/sub 2/Cu/sub 3/O/sub 7/.
- Research Organization:
- Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
- OSTI ID:
- 6182571
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Vol. 39:13
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
PHYSICAL PROPERTIES
COPPER OXIDES
ERBIUM OXIDES
ANISOTROPY
CRYSTAL FIELD
DIAMAGNETISM
ERBIUM IONS
ISING MODEL
MAGNETIC SUSCEPTIBILITY
NEUTRON DIFFRACTION
ORTHORHOMBIC LATTICES
SCALING LAWS
SPECIFIC HEAT
SUPERCONDUCTIVITY
TETRAGONAL LATTICES
TRANSITION TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
COHERENT SCATTERING
COPPER COMPOUNDS
CRYSTAL LATTICES
CRYSTAL MODELS
CRYSTAL STRUCTURE
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ERBIUM COMPOUNDS
IONS
MAGNETIC PROPERTIES
MAGNETISM
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SCATTERING
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity