Thermal conductivity and electrical resistivity of the T{prime} phase and the T phase in 2-1-4 oxide superconductors

Journal Article · Sat Oct 01 04:00:00 EDT 1994 · Journal of Superconductivity

DOI:https://doi.org/10.1007/BF01320875· OSTI ID:106857

Mori, Katsunori; Nishimura, Katsuhiko; Tanaka, Atsushi ^[1]

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1. Toyama Univ. (Japan); and others

The temperature dependences of the thermal conductivity, k(T), and the electrical resistivity, {rho}(T), of sintered samples of Nd{sub 1.85}Ce{sub 0.15}CuO{sub 4-y} (NCCO) and Pr{sub 1.85}Ce{sub 0.15}CuO{sub 4-y} (PCCO) with the T{prime} phase, and La{sub 1.85}Sr{sub 0.15}CuO{sub 4-y} (LSCO) and La{sub 1.935}Ca{sub 0.065}CuO{sub 4-y} (LCCO) with the T phase, have been measured. The superconducting transition temperature T{sub Con}, of NCCO, PCCO, LSCO, and LCCO were 26.4, 23.0, 37.1, and 8.8 K, respectively. The enhancement of k(T) below just T{sub Con} such as seen in 1-2-3 oxide superconductors was not clearly observed. k(T) for the samples of NCCO and PCCO showed a pronounced maximum such as that of sapphire crystal around 30 and 40 K, respectively. For these samples of NCCO and PCCO, it has been shown that the analysis based on the various phonon scattering mechanisms is in good agreement with this experiment.

• Sponsoring Organization: USDOE
• OSTI ID: 106857
• Journal Information: Journal of Superconductivity, Journal Name: Journal of Superconductivity Journal Issue: 5 Vol. 7; ISSN JOUSEH; ISSN 0896-1107
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERIUM OXIDES
COPPER OXIDES
ELECTRIC CONDUCTIVITY
HIGH-TC SUPERCONDUCTORS
LANTHANUM OXIDES
NEODYMIUM OXIDES
PROMETHIUM OXIDES
STRONTIUM OXIDES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
THERMAL CONDUCTIVITY
TRANSITION TEMPERATURE