Effective Magnetic Field Dependence of the Flux Pinning Energy in FeSeTe Superconductor.

The role of a layered structure in superconducting pinning properties is still at a debate. The effects of the vortex shape, which can assume for example a staircase form, could influence the interplay with extrinsic pinning coming from the specific defects of the material, thus inducing an effective magnetic field dependence. To enlighten this role, we analysed the angular dependence of flux pinning energy (,) as a function of magnetic field in FeSeTe thin film by considering the field components along the -plane of the crystal structure and the -axis direction.