Phenomenological model for history effects and metastability in weakly pinned superconductors

G. Ravikumar; K. V. Bhagwat; V. C. Sahni; A. K. Grover; S. Ramakrishnan; S. Bhattacharya

doi:10.1103/PhysRevB.61.R6479

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Phenomenological model for history effects and metastability in weakly pinned superconductors

G. Ravikumar, K. V. Bhagwat, V. C. Sahni, A. K. Grover, S. Ramakrishnan, S. Bhattacharya

DOI 10.1103/PhysRevB.61.R6479 · Physical Review B

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Abstract

We present a phenomenological model to describe features in the hysteretic magnetic response of weak pinning superconductors across the peak effect region. It accounts for the experimentally observed history dependent behavior of critical current density and the metastability of the vortex state prior to and across the peak effect region of superconducting systems such as NbSe2, CeRu2, and YBa2Cu3O7. Moreover, this model reduces to Bean’s critical state model as a limiting case.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CeRu2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Ca3Rh4Sn13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown