Vortex-glass transition in the cubic superconductor

We present a detailed characterization of the vortex-glass transition in the cubic (Formula presented) superconductor (with critical temperature (Formula presented) Combining transport measurements down to (Formula presented) and third-harmonic susceptibility close to (Formula presented) we show that the vortex-glass transition field can be well fitted by a power law: (Formula presented) with (Formula presented) over three magnetic field decades. In striking contrast with cuprates, this simple behavior holds down to our lowest temperature. The (Formula presented) characteristics are consistent with the vortex-glass transition for both (Formula presented) and (Formula presented) configurations assuming that, close to (Formula presented) the vortex line is making an average angle (Formula presented) with the external field. The vortex-glass correlation length reaches several (Formula presented) in the vicinity of the transition, showing that vortices are correlated over more than (Formula presented) (where (Formula presented) is the intervortex spacing). The characteristic exponents (Formula presented) and (Formula presented) are field independent and do not depend on the relative orientation of the magnetic field and the current density.