[19p-P06-1~50] 10 Spintronics and Magnetics (Poster)

[19p-P06-31] Superconductivity and Magnetic Properties of (100)-textured β-Sn/M (M = Ni,Cu) Multilayer Films Fabricated by Electron Beam Evaporation

〇Hiroki Kumazawa¹, Keisuke Yamada¹, Mutsuhiro Shima¹ (1.Gifu Univ.)

Keywords:

thin film,magnetism,superconductivity

Superconductivity and magnetic properties of Sn/M/Sn multilayer films consisting of (100)-oriented β-Sn and metal M (= Ni, Cu) layers grown by electron beam evaporation have been investigated as a function of M layer thickness d_M with constant Sn layer thickness d_Sn = 25 nm. With increasing magnetic Ni layer thickness d_Ni from 0 nm to 5 nm in Sn/Ni/Sn, the superconducting critical temperature is found to decrease from 3.73 K to 2.49 K. The data fitting analysis with theory using the temperature dependence of critical magnetic field along with structural characterization demonstrates to elucidate how the film structure and layer thickness affects the superconducting coherence length and magnetic field penetration depth. The results will be discussed in comparison with those of Sn/Cu/Sn consisting of non-magnetic Cu layer.