Peak effect in a superconductor/normal-metal strip in a vortex-free state

P. M. Marychev; D. Yu. Vodolazov

doi:10.1103/PhysRevB.105.094522

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Peak effect in a superconductor/normal-metal strip in a vortex-free state

P. M. Marychev, D. Yu. Vodolazov

DOI 10.1103/PhysRevB.105.094522 · Physical Review B

T1

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Abstract

We theoretically predict that the critical current Ic and magnetization M of a hybrid superconductor/normal-metal (SN) strip may have nonmonotonous dependence on a perpendicular magnetic field—so-called peak effect. In contrast to familiar peak effect, which is connected either with vortex entry to the superconductor or with peculiarities of vortex pinning, the found phenomenon exists at low fields, in the vortex-free (Meissner) phase. We argue that the effect appears at specific parameters of the studied hybrid structure when its in-plane current-supervelocity relation has two maxima. We expect that the same peak effect may exist in two-band superconductors (like MgB2) where similar current-supervelocity dependence was predicted at low temperatures.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown