Abstract: An improved white-lite emitting electroluminescent display capable of emitting a light having a red, blue, and green wave length in a single material and having a buffer layer of Si.sub.x N.sub.y between a dielectric layer of BaTa.sub.2 O.sub.6 and a light-emitting layer, which includes a substrate; a lower dielectric layer of Bata.sub.2 O.sub.6 formed on a transparent electrode; a light-emitting layer of SrS:Pr,F formed on the lower dielectric layer; a buffer layer of Si.sub.x N.sub.y formed on the light-emitting layer; a upper dielectric layer of BaTa.sub.2 O.sub.6 formed on the buffer layer; and an upper electrode formed on the upper dielectric layer, and further includes the steps of a first step which forms a lower electrode on a substrate; a second step which forms a light-emitting layer of SrS:Pr.F on a lower dielectric layer; a third step which forms a buffer layer of Si.sub.x N.sub.y on the light-emitting layer; a fourth step which forms a upper dielectric layer of BaTa.sub.2 O.sub.

Abstract: An improved two-coil apparatus for measuring the absolute value of magnetic penetration depth .lambda. of superconductor films which is capable of measuring the absolute value of magnetic penetration depth which is denoted as .lambda. of a large area high temperature superconductor film using a low frequency or a static weak magnetic field, which includes a drive coil that is designed to suppresses the screening current of the film at the film edge a receive coil opposingly spaced-apart from the drive coil; sample holders disposed at the left-and right-sides of the receive coil; a large area low temperature superconductor film attached on the sample holder between the drive coil and the receive coil; and a large area high temperature superconductor film mounted on the large area low temperature superconductor film between the drive coil and the receive coil.