Dimensionality of the Superconductivity in YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub>
Kazushi KanodaDepartment of Physics, Gakushuin UniversityTakeshi KawagoeDepartment of Physics, Gakushuin UniversityMasahiko HasumiDepartment of Pure and Applied Sciences, The University of TokyoToshihiro TakahashiDepartment of Physics, Gakushuin UniversityS. KagoshimaDepartment of Pure and Applied Sciences, The University of TokyoTadashi MizoguchiDepartment of Physics, Gakushuin University
1988en
ABI
Annotatsiya
Superconducting fluctuation-induced diamagnetism was observed in YBa 2 Cu 3 O 7-δ with different oxygen deficiencies. In a slightly deficient sample, the fluctuation is small and exhibits the temperature dependence of a three-dimensional nature. With increasing defects, however, the fluctuations were found to be enhanced and exhibit a crossover from three- to two-dimensional behaviors at higher temperatures. The dimensionality, which is controlled by the interlayer coupling between the CuO 2 planes, is very sensitive to oxygen deficiency in the CuO chains, even when the critical temperature remains around 90 K.
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