U. Tiwari et al., PHASE-TRANSITION IN A PEROVSKITE SUPERCONDUCTOR BY RADIATION-INDUCED LATTICE EXCITATIONS, Europhysics letters, 25(9), 1994, pp. 705-710
We report (2212) --> (2223) phase modification in a mixed phase, Bi-ba
sed oxide superconductor. In contrast to established procedures, this
has been possible employing high-energy ion irradiation at 80 K. A nuc
leation process, assisted through radiation-induced vacancy creation a
nd their subsequent annihilation by the existing interstitials, is sho
wn to achieve the observed phase transformation.