Local Magnetometry of Superconducting Mo8Ga41 and Mo7VGa41: Vortex Pinning Study

M. Marcin, Z. Pribulová, J. Kačmarčík, V.Yu. Verchenko, A.V. Shevelkov, V. Cambel, J. Šoltýs, P. Samuely
2020 Acta Physica Polonica. A  
Endohedral gallide cluster superconductor Mo8Ga41 indicated some unusual superconducting properties that deviated from BCS theory. This was ascribed to possible multi-gap superconductivity. Moreover, these properties seem to vanish after the substitution of vanadium atom for molybdenum. Here, we present a local magnetization study of both compounds, Mo8Ga41 and Mo7VGa41. An array of miniature Hall probes was used to study magnetic profile which reflects vortex distribution inside the sample.
more » ... vortex pinning observed in both materials is strong. Calculated critical current density values suggest, that vortex pinning in Mo8Ga41 manifests itself to a greater extent than in Mo7VGa41.
doi:10.12693/aphyspola.137.794 fatcat:piv6nbyktvf6fiwayxkrlyfykq