Naslov
Low-field magnetoresistance of Bi2Sr2CaCu2O8 single crystals in the vicinity of Tc

Autori
Babić, Dinko ; Ivkov, Jovica ; Heinrich, N. ; Leontić, Boran

Izvornik
Physical Review. Bb (0031-9120) 49 (1994), 22; 15965-15969

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
74.72.Hs; 72.15.Gd; 74.40.+k

Sažetak
We report a systematic study of the magnetoresistance of Bi-2:2:1:2 single crystals using a small transport current and in magnetic fields less than 1 T. A few kelvin below the transition temperature we find excellent agreement with the theory of superconducting order-parameter fluctuations in two-dimensional systems. The critical temperature of an isolated double CuO2 sheet is estimated at 37 K, and the field which decouples CuO2 sheets at 0.1–0.2 T. By measuring the magnetoresistance in weak applied fields it is possible to determine the presence of small amounts of the Bi-2:2:2:3 phase. The presence of this latter phase makes the analysis of the fluctuation-enhanced conductivity above Tc very complicated.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA