Magnetization studies on superconducting MgB$_2$ - lower and upper critical fields and critical current density

Amish G. Joshi; C. G. S. Pillai; P. Raj; S. K. Malik

doi:10.1016/S0038-1098(01)00149-1

Magnetization studies on superconducting MgB$_2$ - lower and upper critical fields and critical current density

Superconductivity 2007-05-23 v1

Authors: Amish G. Joshi , C. G. S. Pillai , P. Raj , S. K. Malik

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Magnetization studies have been carried out on superconducting MgB $_2$ (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.

Keywords

mgb2 superconductivity magnetization superconductivity

Cite

@article{arxiv.cond-mat/0103302,
  title  = {Magnetization studies on superconducting MgB$_2$ - lower and upper critical fields and critical current density},
  author = {Amish G. Joshi and C. G. S. Pillai and P. Raj and S. K. Malik},
  journal= {arXiv preprint arXiv:cond-mat/0103302},
  year   = {2007}
}

Comments

7 pages, 6 figures, to be publihed in Solid State Communications (2001) [in press]

Magnetization studies on superconducting MgB$_2$ - lower and upper critical fields and critical current density

Abstract

Keywords

Cite

Comments

Related papers