Enhanced Critical Currents of Superconducting ErNi2B2C in the Ferromagnetically Ordered State

P. L. Gammel; B. Barber; D. Lopez; A. P. Ramirez; D. J. Bishop; S. L. Bud'ko; P. C. Canfield

doi:10.1103/PhysRevLett.84.2497

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Enhanced Critical Currents of Superconducting ErNi2B2C in the Ferromagnetically Ordered State

P. L. Gammel, B. Barber, D. Lopez, A. P. Ramirez, D. J. Bishop, S. L. Bud'ko, P. C. Canfield

DOI 10.1103/PhysRevLett.84.2497 · Physical Review Letters

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Abstract

We report on transport and magnetization studies of the critical current in single crystal ErNi2B2C for applied fields below 4 kG. Below T≈2.5K superconductivity coexists with weak ferromagnetism. We find that the critical currents are strongly enhanced for all field orientations in this ferromagnetic regime, corresponding to a threefold increase of the pinning force of the flux line lattice. We speculate that this increase is due to strong pair breaking by the ferromagnetism.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
ErNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	10	Pressure not reported	unknown
ErNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	10	Pressure not reported	unknown