Magnetization in a generalized critical-state model for type-II superconductors

✍ Scribed by P.O. Hetland; T.H. Johansen; H. Bratsberg

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 445 KB
• Volume: 36
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(96)80768-5

✦ Synopsis

This paper describes the magnetization of type-11 superconductors in the critical state, where the critical current density, J,, has a field dependence of the form J,( 6) = &A 1 + BIB,)". Explicit formulae are derived for the various branches of the complete high-field hysteresis loop. The geometry under consideration is that of an infinitely long rectangular bar placed in a parallel applied field. In the discussion, emphasis is put on the behaviour of the vertical width, AM, of the hysteresis loop, and a simple graphical method to fit model parameters to experimental data is outlined.