6533b86efe1ef96bd12cac43

RESEARCH PRODUCT

Shift of the surface-barrier part of the irreversibility line due to columnar defects in Bi2Sr2CaCu2O8 thin films

M. BassetYu. TalanovGerhard JakobH. AdrianG. Wirth

subject

SuperconductivityMaterials scienceFlux pinningCondensed matter physicsCondensed Matter - SuperconductivityFOS: Physical sciencesEnergy Engineering and Power TechnologyCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsMagnetic fieldSuperconductivity (cond-mat.supr-con)HysteresisCondensed Matter::SuperconductivityCuprateIrradiationElectrical and Electronic EngineeringThin filmType-II superconductor

description

We report the results of studying the influence of the uranium-ion irradiation of the Bi_2Sr_2CaCu_2O_8 thin films on the high-temperature part (close to critical temperature) of their irreversibility line. We studied irreversible properties of the films by measuring the hysteresis of nonresonant microwave absorption. The results have revealed the shift of irreversibility line towards low temperatures and magnetic fields. The effect is most significant for the films irradiated with large doses, more than 1T. This fact is in good agreement with the theoretical prediction by Koshelev and Vinokur of suppression of surface barrier by columnar defects.

https://doi.org/10.1016/j.physc.2003.09.068