Relaxation of the magnetisation in superconducting oxides

GABOVICH, A. M.; MOISEEV, D. P.; PANAITOV, G. I.; POSTNIKOV, V. M.; SIDORENKO, A. S.; SIMONOV, A. Yu.

Relaxation of the magnetisation in superconducting oxides

GABOVICH, A. M.; MOISEEV, D. P.; PANAITOV, G. I.; POSTNIKOV, V. M.; SIDORENKO, A. S.; SIMONOV, A. Yu.

URI: https://doi.org/10.1142/S0217979289000968
http://repository.utm.md/handle/5014/12167

Date: 1989

Abstract:

Relaxation of the thermoremanent magnetisation M in oxide superconductors BaPb0.75Bi0.25O3, YBa2Cu3O7−δ, Bi2Sr2CaCu2Ox and Bi4Sr3Ca4Cu4Ox is measured at T=4.2 K by the SQUID magnetometer. It is well described by the law M(t)=M0-Slnt, where t is the time, M0 and S are constants. The dependence of the decay rate S on the external magnetic field H is investigated in detail for the ceramics BaPb0.75Bi0.25O3 with a low first critical magnetic field Hcl~12 Oe.