Use of a Sigmoid Function to Describe Second Peak in Magnetization Loops : научное издание


Тип публикации: статья из журнала

Год издания: 2017

Ключевые слова: Boltzmann function, critical current, Extended critical state model, Fishtail, magnetization, order-disorder transition, Peak effect, phase separation, Type II superconductor

Аннотация: Order-disorder transitions of a vortex lattice transfer type-II superconductors from a low critical current state to a high one. The similar transition between different current states can be caused by electromagnetic granularity. A sigmoid curve is proposed to describe the corresponding peak in a field dependence of the macroscopiПоказать полностьюc critical density. Using the extended critical state model, analytic expressions are obtained for the field dependencies of the local critical current density, the depth of equilibrium surface region, and the macroscopic critical current density. The expressions are well fit to published data.

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Журнал: Journal of Superconductivity and Novel Magnetism

Номера страниц: 1785-1789

ISSN журнала: 15571939

Издатель: Springer New York LLC


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