Bose-glass melting in the cubic high oxide with columnar defects

The Bose-glass transition in the fully isotropic (Formula presented) superconductor with columnar defects produced by irradiation with 7.2 GeV Ta ions was studied by transport and nonlinear susceptibility measurements. For fields smaller than the dose equivalent field (Formula presented) the Bose-glass transition line (Formula presented) shifts progressively upwards with increasing dose, (Formula presented) The critical exponents have been deduced from the scaling properties of the transport measurements; we obtain (Formula presented) and (Formula presented) For tilted magnetic fields, the transition temperature scales as (Formula presented) as recently suggested by Lidmar and Wallin.