Magnetoresistance study of 250 MeV Ag+17 ion irradiated YBa2Cu3O7−δ samples

Angle dependent magnetoresistance of the 250 MeV Ag+17 ion irradiated YBa2Cu3O7−δ melt-textured sample and polycrystalline films have been carried out to study the pinning behaviour in the presence of columnar defects. Bose glass scaling laws, both to the melt-textured sample and polycrystalline film have been applied uniquely to the angle dependent magnetoresistance to determine the critical static (v′), dynamic (z′) exponents and the critical angle (θcri). The values were found to be v′∼1.0 and z′∼4.0, respectively for both irradiated melt-textured sample and polycrystalline film. The scaling laws are found to hold good below the critical angle which is found to be different in these samples. The Bose glass temperature ‘TBG’ is found to be maximum along the columnar defects. Besides, the vortex binding energy per unit length has been computed.