Enhancement of flux pinning in neutron irradiated MgB2 superconductor

Babić, Emil and Miljanić, Đuro and Zadro, Krešo and Kušević, Ivica and Marohnić, Željko and Drobac, Đuro and Wang, X. L. and Dou, S. X. (2001) Enhancement of flux pinning in neutron irradiated MgB2 superconductor. Fizika A, 10 (2). pp. 87-94. ISSN 1330-0008

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m-H loops for virgin and neutron irradiated bulk and powder samples of MgB_2 were measured in the temperature range 5-30 K in magnetic field B £ 1 T. The irradiation at thermal neutron fluences 9·10^13 and 4.5·10^14 cm^-2 caused very small enhancement of m-H loops at lower temperatures (T < 20 K), whereas the effect at high temperatures was unclear due to the difficulty in achieving exactly the same measurement temperature prior and after irradiation. However, the irradiation at 4.5·10^15 cm^-2 produced clear enhancement of m-H loops (hence J_c) at all investigated temperatures, which provides the evidence for the enhancement of flux pinning in MgB_2 due to ion tracks resulting from n+^10B reaction. The potential of this technique for the enhancement of flux pinning in high temperature superconductors is briefly discussed.

Item Type: Article
Date: 2001
Subjects: NATURAL SCIENCES > Physics
Divisions: Faculty of Science > Department of Physics
Publisher: Hrvatsko fizikalno društvo
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 15 Apr 2014 15:50
Last Modified: 15 Nov 2018 12:31
URI: http://digre.pmf.unizg.hr/id/eprint/836

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