High-temperature resistivity of RBa/sub 2/Cu/sub 3/O/sub 7-//sub y/, where R = La, Pr, Nd, Sm, Eu, Dy, Ho, Er, and Tm

Journal Article · Mon May 01 00:00:00 EDT 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.9203· OSTI ID:6292850

Yang, H C; Hsieh, M H; Sung, H H; Chen, C H; Horng, H E; Kan, Y S; Chen, H C; Jao, J C

The electrical resistivity rho of RBa/sub 2/Cu/sub 3/O/sub 7-//sub y/, where R = La, Pr, Nd, Eu, Dy, Ho, Er, Sm, and Tm has been measured from room temperature up to 900 K. No essential difference in the transport properties was found except for LaBa/sub 2/Cu/sub 3/O/sub 7-//sub y/ and PrBa/sub 2/Cu/sub 3/O/sub 7-//sub y/ which shows an anomaly in the electrical resistivity. SmBa/sub 2/Cu/sub 3/O/sub 7-//sub y/ samples with various oxygen contents are studied in detail. Metallic behavior and linear temperature dependence of rho have been found for SmBa/sub 2/Cu/sub 3/O/sub 7-//sub y/ with 0<0.227. The linear temperature dependence of rho implies weak electron-phonon coupling, which suggests that other mechanisms for high-T/sub c/ superconductivity are needed.

• Research Organization: Department of Physics, National Taiwan University, Taipei, Taiwan, Republic of China
• OSTI ID: 6292850
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 39:13
• Country of Publication: United States
• Language: English

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HIGH TEMPERATURE
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360204* - Ceramics
Cermets
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