Low-temperature specific heat of La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4/ and La/sub 2/CuO/sub 4/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
The specific heat of polycrystalline samples of the high-T/sub c/ superconductor La/sub 1.85/Sr/sub 0.15/CuO/sub 4/ and the undoped insulator La/sub 2/CuO/sub 4/ have been measured from 80 mK to 4 K and from 7 to 55 K. The low-temperature limit of the specific heat of La/sub 1.85/Sr/sub 0.15/CuO/sub 4/ can be well accounted for by a sizable linear T term (..gamma..T) in addition to the Debye-like term (BT/sup 3/) with ..gamma.. = 1.8 +- 0.2 mJ/K/sup 2/ mol. A contribution due to possible magnetic impurities is also present. In contrast, the coefficient of the linear T term in La/sub 2/CuO/sub 4/ is found to be 0.2 +- 0.2 mJ/K/sup 2/ mol. The large linear T term in the superconducting sample suggests the presence of the Fermi-liquid--type excitations at low temperatures.
- Research Organization:
- Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802
- OSTI ID:
- 6781667
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:10; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Journal Article
·
Mon Nov 30 23:00:00 EST 1987
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·
OSTI ID:5741094
Thermal properties of the high-T/sub c/ superconductors La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4/ and YBa/sub 2/Cu/sub 3/O/sub 7/
Journal Article
·
Thu Oct 01 00:00:00 EDT 1987
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6140652
Heat capacity of superconducting La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4/
Journal Article
·
Fri May 01 00:00:00 EDT 1987
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6878069
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
CHALCOGENIDES
CHARGE CARRIERS
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
IMPURITIES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
RARE EARTH COMPOUNDS
SAMPLE PREPARATION
SPECIFIC HEAT
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHARGE CARRIERS
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
IMPURITIES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
RARE EARTH COMPOUNDS
SAMPLE PREPARATION
SPECIFIC HEAT
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS