Interplay of Local-Moment Ferromagnetism and Superconductivity in ErRh${}_4$B${}_4$ Single Crystals

Abstract

Tunnel-diode resonator technique was used to study crystals of ferromagnetic re-entrant superconductor, ErRh${}_4$B${}_4$. At the boundary between ferromagnetism (FM) and superconductivity (SC), dynamic magnetic susceptibility, $\chi (T,H)$, exhibits highly asymmetric behavior upon warming and cooling as well as enhanced diamagnetism on the SC side. SC phase nucleates upon warming in a cascade of discontinuous jumps in magnetic susceptibility $\chi (T,H)$, whereas FM phase develops gradually as reported in detail in \cite{prozorov2008}. Here we further investigate enhanced diamagnetism. We find that when a magnetic field is applied along the magnetic easy axes, a region of enhanced diamagnetic screening is smaller than in the perpendicular orientation. A discussion of possible causes of this effect is provided.

submitted to proceedings of LT-25 conference (Amsterdam, 2008)

References in corpus (2)

• Magnetic Penetration Depth in Unconventional Superconductors
• Zooming into the coexisting regime of ferromagnetism and superconductivity in ErRh4B4 single crystals

Cited by in corpus (1)

• Effect of controlled artificial disorder on the magnetic properties of EuFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ ferromagnetic superconductor