Title :
Flux Pinning Properties of Multilayered MgB2/Ni Thin Films
Author :
Fukuyama, Kandai ; Doi, Toshiya ; Kitaguchi, Hitoshi ; Mori, Zon ; Masuda, Kazuyuki ; Hamada, Syuzo ; Hakuraku, Yoshinori
Author_Institution :
Kagoshima Univ., Kagoshima
fDate :
6/1/2007 12:00:00 AM
Abstract :
In this paper, we will show the superconducting properties of the alternately-layered MgB2/Ni thin films. MgB2/Ni multilayered thin films were prepared on silicon substrates (100) by sequentially switching an electron beam evaporation technique and a coaxial vacuum arc evaporation source. The lattice spacing of artificial pinning layers was designed to correspond to a magnetic field of 8 T (flux line lattice spacing of 15 nm). As a result, clear enhancement of Jc was observed in the multilayered thin film when the fields applied parallel to the film surface. The results suggest a great possibility of the artificial nanostructure to improve superconducting performances of MgB2.
Keywords :
critical current density (superconductivity); electron beam deposition; flux pinning; magnesium compounds; multilayers; nickel; silicon; superconducting thin films; vacuum deposition; MgB2-Ni-Si interface; Si surface; critical current density; electron beam evaporation technique; flux pinning properties; magnetic flux density 8 T; multilayered thin films; silicon substrates; superconducting properties; Coaxial components; Electron beams; Flux pinning; Lattices; Semiconductor thin films; Silicon; Substrates; Superconducting thin films; Vacuum arcs; Vacuum technology; ${rm MgB}_{2}$; Artificial pinning; electron beam evaporation; superconductors; thin films;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.898210
