The influence of the neutron induced point defects on the transport properties of ceramic YBa2Cu3O7-δ has been investigated. Pellets of sintered YBa2Cu3O7-δ with three different oxygen contents have been irradiated with fast neutron beams of energies 6.5, 3.3 and 4.4 MeV at fluence of 7.7·104, 1.3·+109 and 1.4·109 n/cm2 respectively. The radiation damage has been investigated by comparing the critical temperature (Tc mid), the zero-resistivity and the onset temperature, before and after neutron irradiation. The critical current as a function of the temperature has been measured for some samples in the same experimental conditions. We argue the existence of two networks of defects, not so tightly connected with intra-grain or inter-grain defects. The first one should be an ordered network of defects and mainly affects the Tc mid temperature; the second one, disordered, affects also the room temperature resistance, the amplitude of the transition and the critical current density.

On the influence of neutron induced point-defects on the transport properties of ceramic YBa2Cu3O7-y / E., Mezzetti; Gerbaldo, Roberto; D., Andreone; V., Lacquaniti; R., Cherubini. - 48:(1990), pp. 201-212. (Intervento presentato al convegno Annual Meeting of the Gruppo Nazionale di Struttura della Materia CNR tenutosi a Milan (ITA) nel 17-19 Jan. 1990).

On the influence of neutron induced point-defects on the transport properties of ceramic YBa2Cu3O7-y

GERBALDO, Roberto;
1990

Abstract

The influence of the neutron induced point defects on the transport properties of ceramic YBa2Cu3O7-δ has been investigated. Pellets of sintered YBa2Cu3O7-δ with three different oxygen contents have been irradiated with fast neutron beams of energies 6.5, 3.3 and 4.4 MeV at fluence of 7.7·104, 1.3·+109 and 1.4·109 n/cm2 respectively. The radiation damage has been investigated by comparing the critical temperature (Tc mid), the zero-resistivity and the onset temperature, before and after neutron irradiation. The critical current as a function of the temperature has been measured for some samples in the same experimental conditions. We argue the existence of two networks of defects, not so tightly connected with intra-grain or inter-grain defects. The first one should be an ordered network of defects and mainly affects the Tc mid temperature; the second one, disordered, affects also the room temperature resistance, the amplitude of the transition and the critical current density.
1990
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1661858
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