Magnetic field dependence of the reversible mixed-state properties of superconducting MgB{sub 2} single crystals and the influence of artificial defects
- Atomic Institute of the Austrian Universities, 1020 Vienna (Austria)
- Solid State Physics Laboratory, ETH, 8093 Zurich (Switzerland)
The reversible mixed-state properties of superconducting MgB{sub 2} are summarized and discussed in terms of new results and evaluations, which take the two band character of the material explicitly into account. The magnetic field dependence of the reversible magnetization is analyzed within Ginzburg Landau theory which, however, fits only either at high or at low fields. The resulting parameters (e.g., characteristic fields, lengths, and anisotropy) are quite different in these two regimes. We find large anisotropies of about 4.6 at high fields and low temperatures, but values close to 1 at low fields. Finally, we present neutron irradiation experiments, where new defects, leading to strong irreversibility but also to a modification of the reversible properties, are induced.
- OSTI ID:
- 20662263
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 70, Issue 21; Other Information: DOI: 10.1103/PhysRevB.70.214516; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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