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Measurement and Interpretation of AC Susceptibility and Loss in High Temperature Superconductors

Published

Author(s)

C C. Silva, M E. McHenry

Abstract

Intrinsic and hysteretic AC losses were investigated in high temperature superconductors. AC susceptibility was measured as a function of magnetic field, frequency, temperature and field history. Three types of loss mechanisms were observed and each associated with a different loss peak on the imaginary component of the AC susceptibility: the intrinsic, the intergranular and the intragranular peaks. The peaks are observed to hcange systematically with temperature and magnetic field. Both polycrystalline and single crystals were investigated. YBCO polycrystalline samples were prepared by three different techniques: solid state synthesis (SSS), melt-process melt-growth (MPMG) and freeze-dried and studied both as bulk and powder samples. LSCO and BSCCO-2223 single crystals were studied and their results were compared to the results obtained from the polycrystalline samples.
Citation
Journal of Magnetism and Magnetic Materials

Keywords

anisotropy, magnetic coupling, superconductivity-high-Tc, susceptibility-ac

Citation

Silva, C. and McHenry, M. (2008), Measurement and Interpretation of AC Susceptibility and Loss in High Temperature Superconductors, Journal of Magnetism and Magnetic Materials (Accessed April 21, 2024)
Created October 16, 2008