Flux motion dissipation in La2−xSrxCuO4 as a function of doping

✍ Scribed by Minoru Suzuki

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 216 KB
• Volume: 185-189
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(91)91296-g

✦ Synopsis

Resistive transition of La~_=Sr=CuO~ single-crystM thin films with various x has been measured under magnetic fields. It is found that resistivity p scales as p(T) = p0 exp{-U(H)[1 -TITtle/ks} with n = 3 for Hl[c and n = 1.5 ,~ 2.5 for ~ I c dependi~tg on x. The resistive behavior is explained by the thermally-activated flux motion in quasi-two dimensional superconductors, where U decreases with x. The numeric~i h~ing also provides values for the mean-field upper critical field, which delineates straight H -T phase boundaries.