Heat capacity of untwinned YBa sub 2 Cu sub 3 O sub 7 minus. delta. crystals along the H sub c 2 line

Journal Article · Mon Jan 14 04:00:00 EST 1991 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.66.232· OSTI ID:6172363

Inderhees, S E; Salamon, M B; Rice, J P; Ginsberg, D M ^[1]

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1. Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801 (US)

We report heat-capacity measurements on untwinned YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystals in magnetic fields {ital H}{le}7 T, for both {bold H} {bold c} and {bold H}{perpendicular}{bold c}. Adding Gaussian fluctuations to a BCS-like step, we obtain a fit for {ital H}=0, {ital T}{approx}{ital T}{sub {ital c}} that is consistent with a 3D, two-component order parameter in the strong-coupling limit. However, the {ital H}{ne}0 data are inconsistent with this approach. A finite-size-scaling analysis, assuming critical behavior and an {ital H}-dependent length, satisfactorily describes the data.

• OSTI ID: 6172363
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 66:2; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

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
BCS THEORY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
COUPLING
CRYSTALS
DATA
EXPERIMENTAL DATA
FLUCTUATIONS
FUNCTIONS
GAUSS FUNCTION
HIGH-TC SUPERCONDUCTORS
INFORMATION
LOW TEMPERATURE
MAGNETIC FIELDS
MONOCRYSTALS
NUMERICAL DATA
ORDER PARAMETERS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PHYSICAL PROPERTIES
SCALING LAWS
SIZE
SPECIFIC HEAT
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TWINNING
VARIATIONS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES