Tilting instability and other anomalies in the flux-lattice in some magnetic superconductors

Abstract

The flux-line lattice in the compound $ErN{i}_2{B}_{2}C$, which has a tendency to ferromagnetic order in the a-b plane is studied with 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 near the onset of ferromagnetic order. The enhanced fluctuations in the flux lattice and the square flux lattice recently observed are explained and further experiments suggested.

12 pages, Latex file, no figure

References in corpus (1)

• Spontaneous vortex phase discovered?

Cited by in corpus (5)

• "Soft" Anharmonic Vortex Glass in Ferromagnetic Superconductors
• Prediction of polaron-like vortices and dissociation depinning transition in magnetic superconductors: The example of ErNi2B2C
• Microwave Response and Spin Waves in Superconducting Ferromagnets
• Elasticity, fluctuations and vortex pinning in ferromagnetic superconductors: A "columnar elastic glass"
• Properties of a magnetic superconductor with weak magnetization - application to $ErN{i}_2{B}_{2}C$