In order in production method of two magnesium boride super-conductivity thin films and in two magnesium boride

摘要

PROBLEM TO BE SOLVED: To provide a magnesium diboride (MgB₂) superconductive thin film exhibiting high critical current density to a wide range of applied magnetic field angle.;SOLUTION: Columnar MgB₂ crystal grains are grown to be inclined to a substrate normal line by supplying magnesium (Mg) vapor and boron (B) vapor from an inclined direction to a substrate normal line axis in high vacuum. The MgB₂ superconductive thin film consisting of a plurality of layers including the columnar MgB₂ crystal grains where the inclination angle of grain boundaries is mutually different is formed by controlling the supplying angle of magnesium (Mg) vapor and boron (B) vapor to a substrate.;COPYRIGHT: (C)2008,JPO&INPIT