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Neutron irradiation of Mg11B2: From the enhancement to the suppression of superconducting properties

Appl. Phys. Lett. 86, 112503 (2005); doi:10.1063/1.1880450

Published 7 March 2005

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M. Putti, V. Braccini, C. Ferdeghini, F. Gatti, G. Grasso, P. Manfrinetti, D. Marré, A. Palenzona, I. Pallecchi, and C. Tarantini
INFM-LAMIA and Università di Genova, via Dodecaneso 33, 16146 Genova Italy

I. Sheikin
GHMFL, MPI-FKF/CNRS, 28 Avenue des Martyrs, BP 166, 38042 Grenoble, France

H. U. Aebersold and E. Lehmann
Paul Scherrer Institut, CH-5232 Villagen, Switzerland
In this letter, we present the effect of neutron irradiation up to fluences of 1.4×1020  cm–2 on the superconducting properties of MgB2. In order to obtain a homogeneously distributed disorder, the experiment was carried out on bulk samples prepared with the 11B isotope. Up to fluences of 1018  cm–2, the critical temperature (Tc) is slightly diminished (36  K) and the superconducting properties are significantly improved; the upper critical field is increased from 13.5  T to 20.3  T at 12  K and the irreversibility field is doubled at 5  K. For the largest neutron fluence, Tc is suppressed down to 9.2  K and the superconducting properties come out strongly degraded. ©2005 American Institute of Physics
History: Received 23 September 2004; accepted 18 January 2005; published 7 March 2005
Permalink: http://link.aip.org/link/?APPLAB/86/112503/1
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KEYWORDS and PACS

Keywords
PACS
  • 74.70.Ad
    Superconducting metals; alloys and binary compounds (including A15, MgB2, etc.)
  • 74.25.Fy
    Transport properties of superconductors including electric and thermal conductivity, thermoelectric effects, etc
  • 61.80.Hg
    Neutron radiation effects
  • 61.82.-d
    Radiation effects on specific materials
  • 74.25.Sv
    Critical currents in superconductors
  • 74.10.+v
    Occurrence of superconductivity including potential candidates
  • 74.62.Yb
    Other effects on superconducting transition temperature
  • 74.25.Op
    Mixed states, critical fields, and surface sheaths in superconductors
  • YEAR: 2005

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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