Tilting Instability and Other Anomalies in the Flux Lattice in Some Magnetic Superconductors

T. K. Ng; C. M. Varma

doi:10.1103/PhysRevLett.78.3745

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Tilting Instability and Other Anomalies in the Flux Lattice in Some Magnetic Superconductors

T. K. Ng, C. M. Varma

DOI 10.1103/PhysRevLett.78.3745 · Physical Review Letters

T1

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Abstract

The flux-line lattice in the compound ErNi2B2C, which has a tendency to ferromagnetic order in the a- b plane, is studied with the external magnetic field direction close to the c axis. We show the existence of an instability, where the direction of flux lines spontaneously tilts away from that of the applied field as a prelude to the onset of ferromagnetic order and the predicted spontaneous vortex phase. This tilting instability is accompanied by a decreasing longitudinal correlation length of the flux lattice, as observed.

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.	—	Pressure not reported	unknown