Evidence for a smooth superconductor to normal state transition for nonzero applied magnetic field in RbOs2O6

TL;DR

This study investigates how magnetic fields influence the transition from superconducting to normal states in RbOs2O6, revealing a smooth transition due to finite size effects induced by the magnetic field.

Contribution

It provides experimental evidence that magnetic fields induce a finite size effect, leading to a smooth superconductor-normal transition in RbOs2O6.

Findings

Magnetization data consistent with magnetic field induced finite size effect.

Transition becomes smooth for nonzero magnetic fields.

Scaled magnetization data collapse onto a single curve.

Abstract

The effect of the magnetic field on the critical behavior of RbOs2O6 is investigated. We present and analyze magnetization data, revealing remarkable consistency with a magnetic field induced finye size effect. It is traced back that at temperatures Tp(H) smaller than Tc the correlation length cannot grow beyond the limiting length scale set by the magnetic field. Thus, for nonzero H the transition from the superconducting to the normal state turns out to be smooth and the apropriately scaled magnetization data fall on a single curve.