Sudershan, Y. S. ; Rastogi, Amit ; Bhat, S. V. ; Grover, A. K. ; Yamaguchi, Y. ; Oka, K. ; Nishihara, Y. (1998) Possible non-resonant r.f. absorption evidence for superconducting fluctuations above TC in Bi2Sr2CaCu2O8 single crystals Solid State Communications, 107 (7). pp. 373-378. ISSN 0038-1098
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00381...
Related URL: http://dx.doi.org/10.1016/S0038-1098(98)00156-2
Abstract
The magnetic field dependent r.f. (20 MHz) power dissipation, P(H) vs H, for Hr.f. || c || H in Bi2Sr2CaCu2O8 (Bi 2 2 1 2) single crystals shows an onset at T~102 K, nearly 20 K above the nominal TC (~82 K). In contrast, for Hr.f. || ab, H || c, the onset of losses occurs at the TC. One possible reason for the onset at ~102 K could be the Bi2Sr2Ca2Cu3O8 (Bi 2 2 2 3) inclusions with a TC ~100-110 K. However, our non-resonant r.f. absorption studies cast doubt on this conclusion and point towards an alternative explanation in terms of superconducting fluctuations above the TC of Bi 2 2 1 2 single crystals. Support for this is provided by the characteristic temperature dependence of the magnetic field dependent r.f. dissipation.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | A High-Tc Superconductors; D. Electron-electron Interactions |
| ID Code: | 14370 |
| Deposited On: | 12 Nov 2010 09:01 |
| Last Modified: | 23 May 2011 06:38 |
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