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Title: Magnetic field dependence of the reversible mixed-state properties of superconducting MgB{sub 2} single crystals and the influence of artificial defects

Abstract

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.

Authors:
; ;  [1]; ; ;  [2]
  1. Atomic Institute of the Austrian Universities, 1020 Vienna (Austria)
  2. Solid State Physics Laboratory, ETH, 8093 Zurich (Switzerland)
Publication Date:
OSTI Identifier:
20662263
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 70; Journal Issue: 21; Other Information: DOI: 10.1103/PhysRevB.70.214516; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; CRYSTAL DEFECTS; GINZBURG-LANDAU THEORY; IRRADIATION; MAGNESIUM BORIDES; MAGNETIC FIELDS; MAGNETIZATION; MIXED STATE; MONOCRYSTALS; NEUTRONS; NUCLEON BEAMS

Citation Formats

Zehetmayer, M, Eisterer, M, Weber, H W, Jun, J, Kazakov, S M, and Karpinski, J. Magnetic field dependence of the reversible mixed-state properties of superconducting MgB{sub 2} single crystals and the influence of artificial defects. United States: N. p., 2004. Web. doi:10.1103/PhysRevB.70.214516.
Zehetmayer, M, Eisterer, M, Weber, H W, Jun, J, Kazakov, S M, & Karpinski, J. Magnetic field dependence of the reversible mixed-state properties of superconducting MgB{sub 2} single crystals and the influence of artificial defects. United States. https://doi.org/10.1103/PhysRevB.70.214516
Zehetmayer, M, Eisterer, M, Weber, H W, Jun, J, Kazakov, S M, and Karpinski, J. Wed . "Magnetic field dependence of the reversible mixed-state properties of superconducting MgB{sub 2} single crystals and the influence of artificial defects". United States. https://doi.org/10.1103/PhysRevB.70.214516.
@article{osti_20662263,
title = {Magnetic field dependence of the reversible mixed-state properties of superconducting MgB{sub 2} single crystals and the influence of artificial defects},
author = {Zehetmayer, M and Eisterer, M and Weber, H W and Jun, J and Kazakov, S M and Karpinski, J},
abstractNote = {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.},
doi = {10.1103/PhysRevB.70.214516},
url = {https://www.osti.gov/biblio/20662263}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 21,
volume = 70,
place = {United States},
year = {2004},
month = {12}
}