Vortex response to AC-fields in Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+ delta </sub>
C J van der Beek; M Essers; P H Kes; M J V Menken; A A Menovsky; C J van der Beek; Kamerlingh Onnes Lab., Leiden Univ., Netherlands; M Essers; Kamerlingh Onnes Lab., Leiden Univ., Netherlands; P H Kes; Kamerlingh Onnes Lab., Leiden Univ., Netherlands; M J V Menken; Kamerlingh Onnes Lab., Leiden Univ., Netherlands; A A Menovsky; Kamerlingh Onnes Lab., Leiden Univ., Netherlands
Журнал:
Superconductor Science and Technology
Дата:
1992-01-01
Аннотация:
Results on the driving-field amplitude dependence of the AC-susceptibility of a Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+ delta </sub>-single crystal measured in an applied DC magnetic field are presented. The data obtained in DC fields higher than 2.5T strongly support 2D plastic creep as determining the diamagnetic transition. At lower fields the susceptibility behaviour is more complex, although at all fields flux motion seems to be diffusive.
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