Mandal, P and Poddar, A and Das, A N and Ghosh, B and Choudhury, Pranab (1990) Excess conductivity and thermally activated dissipation studies in bi2sr2ca1cu2ox single-crystals. Physica C-Superconductivity and its Applications, 169 (1-2). pp. 43-49. ISSN 0921-4534

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The resistivity of Bi2Sr2CalCu2Ox single crystals has been measured in the ab-plane and along the c-axis. In all the directions the resistivity shows metallic behavior in the normal state. Room temperature resistivity along the c-direction is about 64 times higher than that in the ab-plane. Departure from the linear behavior occurs at 96 K and the zero resistance is obtained at 76 K. Excess conductivity analysis shows that the system is 2-dimensional in the temperature range 78.7-96 K and a 3-dimensional one below 78.7 K. Thus, a crossover from 2D to 3D is observed at 78.7 K in the Bi-2212 single crystal. This crossover was not detected in Bi 2212 or 2223 polycrystailine samples. The width of the transition (AT) varies with the application of magnetic field (H) as H °'s5 in Bi 2212 single crystal. The pinning l~otential (Uo) varies as H-'~ where a = 0.3 for the Bi-2212 single crystal and 0.47 for polycrystalline sample.

Item Type: Article
Subjects: Electronics
Depositing User: Bidhan Chaudhuri
Date Deposited: 02 Mar 2016 09:41
Last Modified: 02 Mar 2016 09:41

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