Fujikura Limited

International Superconductivity Technology Center

Showa Electric Wire & Cable Co., Ltd.

Superconductivity Research Laboratory International

Toshio Usui

Tadataka Morishita

Kenji Goto

Nobuyuki Sadakata

Osamu Kohno

Yuji Aoki

Atsushi Kume

Yoshimitsu Ikeno

Mikio Nakagawa

Shin'ya Aoki

Hidekazu Teshima

Taichi Yamaguchi

Akira Oishi

Masayuki Kamei

An apparatus for solid surface analysis capable of carrying out the X-ray fluorescence analysis of the sample surface according to the characteristic X-rays detected by the energy dispersive X-ray detector. The apparatus can also obtain an enlarged image of the sample surface according to the secondary electrons emitted from the excited sample surface detected by the electron detector. The apparatus can also carry out an X-ray diffraction analysis of the sample surface according to diffracted X-rays detected by the diffracted X-ray detector. The apparatus is also capable of attaching or detaching the energy dispersive X-ray detector easily by incorporating a connection room which can be put in a vacuum state independent of the vacuum chamber.

Apparatus for solid surface analysis using X-ray spectroscopy

A substrate material for the preparation of an oxide superconductor includes two different rare earth elements A' and A' in the IIIa group, Ga, and 0, the atomic ratio of these elements being expressed as A'1-xA'xGaO.sub.3 (where 0&lt;x&lt;1), and a mixed crystal material forming a perovskite-type structure having a composition of AGaO.sub.3 with A being at least one of the two rare earth elements A' and A' in the IIIa group, a substrate material for preparing an oxide superconductor includes a mixed crystal material made up of Nd, La, Ga, and O in an atomic ratio of La.sub.1-x Nd.sub.x GaO.sub.3 wherein 0.2.ltoreq.x&lt;1.0, the substrate material forming a GdFeO.sub.3 -type structure; a substrate material for preparing an oxide superconductor includes a mixed material made up of Nd, A.sup.1, Ga, and O in an atomic ratio of A.sup.1.sub.1-x Nd.sub.x GaO.sub.3 where A.sup.1 is a rare earth element excluding La and Nd, and 0.2.ltoreq.x&lt;1.0, the mixed crystal material forming a GdFeO.sub.3 -type structure. A method for the preparation of the oxide superconductor, or a semiconductor, includes forming an intermediate layer of a mixed crystal material of two different rare earth elements A' and A' in the IIIa group, Ga, and O. The atomic ratio of these elements is expressed as A'1-xA'xGaO.sub.3 (where 0&lt;x&lt;1) and the mixed crystal material has a perovskite-type structure whose composition is AGaO.sub.3 with A being at least one of the two rare earth elements A' and A' in the IIIa group.

Substrate material for the preparation of oxide superconductors

A method of producing a superconductor including a superconductive oxide. At least one material is pressed for forming a filling material, the at least one material being selected from the group consisting of a starting material powder of the superconductive oxide, a powder of the superconductive oxide and a compact made of the starting material powder and/or the superconductive oxide powder, for forming a filling material. The filling material is charged into a metallic pipe to form a preform. The preform is moved along an axis thereof. During moving, the preform is swaged perpendicularly to the axis thereof to form a composite having a metallic sheath, made of the metallic pipe, and a core sheathed with the metallic sheath. The core of the composite is heated for producing the superconductive oxide.

Method of producing a superconductive oxide conductor

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Tokyo, Japan

Toshio Usui