Fast neutron irradiation effects on magnetization relaxation in YBCO single crystals
- Vrije Univ., Amsterdam (Netherlands). Faculty of Physics and Astronomy
- Atominstitut der Oesterreichischen Universitaeten, Vienna (Austria)
- Argonne National Lab., IL (United States)
A high-quality YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} single crystal has been investigated by torque magnetometry prior to and following fast neutron irradiation to a fluence of 2{times}10{sup 21} m{sup {minus}2} (E > 0.1 MeV). In addition to large enhancements of the critical current densities, which have been observed in similar form previously by Sauerzopf et al, we find a dramatic change in the relaxation behavior following irradiation. At low temperatures ({le} 50 k) the relaxation rates are lowered by factors up to 4 in the irradiated state in a magnetic field of 1.5 T. At higher temperatures, on the other hand, they are enhanced compared to the unirradiated state. Both before and after irradiation, the magnetization relaxation follows a logarithmic time dependence, which we ascribe to thermally activated flux motion.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10115766
- Report Number(s):
- ANL/CP-74035; CONF-910736-25; ON: DE92005218
- Resource Relation:
- Conference: 3. international conference on materials and mechanisms of superconductivity high temperature superconductors (M2S-HTSC-3): the science of HTSC,Kanazawa (Japan),22-26 Jul 1991; Other Information: PBD: Jul 1991
- Country of Publication:
- United States
- Language:
- English
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