Ka. Delin et al., SWEEP RATE EFFECTS AND MAGNETIZATION LOOPS OF BOTH HIGH-TEMPERATURE AND LOW-TEMPERATURE SUPERCONDUCTORS, Physica. B, Condensed matter, 194, 1994, pp. 1827-1828
We present an extensive study of the magnetization properties of high
quality YBa2Cu3O7 and conventional low-temperature superconducting sin
gle crystals using a vibrating sample magnetometer. The experimental c
onditions cover a wide range of temperatures, applied fields (up to 30
T), and sweep rates. The experimentally measured linear relationship
between the magnetization and the logarithm of the sweep rate is exami
ned in detail. A simple picture of vortex motion as a combination of d
rift and diffusion components provides a particularly useful model for
analyzing the experimental results.