Effect of Cu sup 2+ magnetic moments on the superconductivity of YBa sub 2 Cu sub 3 O sub 7 : The origin of the linear term'' in the specific heat; The volume fraction of superconductivity
Conference
·
OSTI ID:6925546
The concentration (n{sub 2}) of Cu{sup 2+} magnetic moments located on the YBa{sub 2}Cu{sub 3}O{sub 7} lattice is determined by the specific heat in a 7-T magnetic field. The discontinuity in specific heat at {Tc} ({Delta}C({Tc})) and also the coefficient of the linear term ({gamma}(0)) are correlated with n{sub 2} in a way that suggests the operation of a pair-breaking mechanism that limits the transition to the superconducting states and provides a criterion for the volume fraction of superconductivity. {gamma}(0) can be represented by the sum of two contributions, both associated with Cu{sup 2+} moments, implying that there is no contribution that is an intrinsic property of the superconducting state. The interpretation of the data provides estimates of parameters relevant to the recognition of strong-coupling effects. 12 refs., 5 figs.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6925546
- Report Number(s):
- LBL-28863; CONF-9004184--2; ON: DE90011214
- Country of Publication:
- United States
- Language:
- English
Similar Records
Specific heat of YBa sub 2 Cu sub 3 O sub 7 : Origin of the linear'' term and volume fraction of superconductivity
Origin of the linear'' term in the specific heat of YBa sub 2 Cu sub 3 O sub 7
The Debye temperature of YBa sub 2 Cu sub 3 O sub 7-. delta. and its dependence on the volume fraction of superconductivity
Journal Article
·
Mon Jul 16 00:00:00 EDT 1990
· Physical Review Letters; (USA)
·
OSTI ID:6668157
Origin of the linear'' term in the specific heat of YBa sub 2 Cu sub 3 O sub 7
Conference
·
Sat Jul 01 00:00:00 EDT 1989
·
OSTI ID:5555812
The Debye temperature of YBa sub 2 Cu sub 3 O sub 7-. delta. and its dependence on the volume fraction of superconductivity
Conference
·
Sat Nov 30 23:00:00 EST 1991
·
OSTI ID:5735309
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
HIGH-TC SUPERCONDUCTORS
MAGNETIC MOMENTS
METALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SPECIFIC HEAT
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
HIGH-TC SUPERCONDUCTORS
MAGNETIC MOMENTS
METALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SPECIFIC HEAT
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES