Bose-glass transition in Ag/BSCCO-2223 irradiated tapes

Abstract

In this work we show how strongly the interaction between pancakes in the ab-planes and Josephson vortices (JVs) across them is affected by columnar defect (CD) implantation, due to heavy-ion irradiation. By means of the irreversibility temperatures, obtained by the onset of the third harmonic of the a.c. susceptibility, the Bose-glass transition is put in evidence. This transition is limited in phase space size by the JV density, modulated by increasing the in-plane component of the applied field, in Ag/BSCCO-2223 tapes irradiated with 0.25 GeV Au-ions producing CDs reaching the 15% of the depth of the tape.