Magnetization studies on superconducting MgB₂ - lower and upper critical fields and critical current density

2001/03/14 by Amish G. Joshi, C. G. S. Pillai, P. Raj +1
Physics and Astronomy · #cond-mat.supr-con

paper · pdf · doi:10.1016/s0038-1098(01)00149-1

published as Solid State Commun. 118 (2001) 445-448 · 7 pages, 6 figures, to be publihed in Solid State Communications (2001) [in press]

arxiv created 2001/03/14 · arxiv updated 2009/11/30

Abstract

Magnetization studies have been carried out on superconducting MgB₂ (T_c=37K) in the temperature range of 2-50K and in magnetic field up to 5 Tesla. From these measurements, values of the lower critical field H_c1(0), upper critical field H_c2(0) at zero K are estimated to be ~300 Oe and ~12.5 Tesla, respectively, which yield a value of ~26 for the Ginzburg-Landau parameter, k. Magnetization hysteresis loops have been obtained at various temperatures from which the magnetization critical current density is estimated using Bean's critical state model.

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