Observation of an extended magnetic field penetration in amorphous superconducting MoGe films

Nishio, Taichiro*; Okayasu, Satoru  ; Suzuki, Junichi; Kokubo, Nobuhito*; Kadowaki, Kazuo*

We have observed the magnetic field distribution of a vortex generated in amorphous ()-MoGe thin films with various thicknesses () (, where is the penetration depth) with a scanning SQUID microscope. From analyses of the field distribution as functions of the film thickness and temperature, it is found that an effective in-plane penetration depth () extends with descreasing d, in accordance with the Pearl's prediction =2/. Temperature dependence of is also consistent with the two-fluid model involving the Pearl's prediction.