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Defect Network in Superconducting Ceramic Oxides Studied by Neutron and Proton Irradiation

Published online by Cambridge University Press:  26 February 2011

E. Mezzetti ,
D. Andreone ,
G. Castagno ,
R. Cherubini ,
S. Colombo ,
R. Gerbaldo  and
B. Minetti
E. Mezzetti
Affiliation:
Dipartimento di Fisica – Politecnico – 10129 TORINO
D. Andreone
Affiliation:
Istituto Elettrotecnico Nazionale Galileo Ferraris 10135 Torino
G. Castagno
Affiliation:
Dipartimento di Fisica – Politecnico – 10129 TORINO
R. Cherubini
Affiliation:
Laboratori Nazionali di Legnaro, INFN, 35020 Legnaro (Padova).
S. Colombo
Affiliation:
Dipartimento di Fisica – Politecnico – 10129 TORINO
R. Gerbaldo
Affiliation:
Dipartimento di Fisica – Politecnico – 10129 TORINO
B. Minetti
Affiliation:
Dipartimento di Fisica – Politecnico – 10129 TORINO
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Abstract

This paper investigates both transport properties and nature of superconductivity breakdown or, conversely, enhancement in oxide ceramics, due to radiation-induced defects.

Low-fluence neutrons (≈107 n cm-2 at 3 MeV) can sensitively damage the samples, giving experimental evidence that the breakdown of coherent percolating paths produces decoupled domains. A set of preliminary measurements shows that high-fluence proton implantation can either damage or enhance critical current density in a currently non controllable way. In both cases strongly damaged or enhanced superconducting paths short-circuit the unaffected bulk network.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 209: Symposium K – Defects in Materials , 1990 , 753
Copyright
Copyright © Materials Research Society 1991

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References

[1] Andreone, D., Cherubini, R., Mezzetti, E., Minetti, B., II Nuovo Cimento 12D 1017 (1990)CrossRefGoogle Scholar
[2] Blatter, G., Rhyner, J., and Dersch, H., Physica C 162–164, 355 (1989)CrossRefGoogle Scholar
[3] Mezzetti, E., in Physical Phenomena in Granular Materials, edited by Cody, G. D. (Mater. Res. Soc. Proc. 195, S. Francisco, Ca 1990), in press.Google Scholar
[4] Van Dover, R. V., Nature, 342, 55 (1989)CrossRefGoogle Scholar
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[7] Abbattista, F., Andreone, G., Cherubini, R., Mezzetti, E., Vallino, M., Proc. 3-rd Nat. Meeting “High Temperature Superconductivity”, Genova, Italy, 287 (1990).Google Scholar
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[10] Babic, E., et al. Phys. Rew B 41, 6278 (1990).CrossRefGoogle Scholar

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