Little-Parks Effect In A Superconducting Loop With A Magnetic Dot
PHYSICAL REVIEW B(2003)
Abstract
We have studied the nucleation of superconductivity in a mesoscopic Al loop, enclosing a magnetic dot with the perpendicular magnetization. The superconducting phase boundary T-c(B), determined from transport measurements, is asymmetric with respect to the polarity of an applied magnetic field. The maximum critical temperature has been found for a finite applied magnetic field, which is antiparallel to the magnetization of the dot. Theoretical phase boundary shows a good agreement with the experimental data.
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Key words
critical temperature,phase diagram,electron transport,magnetic field
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