 Voltage regulator with ferromagnetic filter |
| OF EMBODIMENT Referring to said drawing, this shows that the actual regulator is conventionally ... |
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| Arrangement for the testing of high voltage direct current switches |
| We claim: 1. In a circuit for the synthetic testing of a high voltage direct current switch, which ... |
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| Apparatus for detection of rotational angle and number of rotations of a rotary body |
| It is an object, therefore, of the present invention to overcome the disadvantage and limitation of ... |
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| Semiconductor switch device |
| It is an object of the present invention to provide a semiconductor switch device wherein a third ... |
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| Slope change detector |
| With this and other objects in view, the invention contemplates a device which generates a signal ... |
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| Waveform instability detector |
| A waveform instability detector is provided which continuously monitors a repetitive unipolar pulse ... |
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| Device for preventing noise leakage and manufacturing method of the device |
| With the above-described problem in mind, it is an object of the present invention to provide a ... |
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| Semiconductor integrated circuit device with a protective circuit |
| An object of this invention is to provide a semiconductor integrated circuit device compatibly ... |
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| Shutdown circuit for blocking oscillator power supply |
| It is the object of the present invention to protect a power system in a more efficient manner than ... |
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| Potential indicating device |
| These disadvantages are overcome by the present invention, which in a preferred embodiment provides ... |
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Composite metal oxide material
| Details |
Inventors: Yamada, Yasuji; Nakamura, Masaru; Tatsumi, Noriyuki; Tsujino, Jiro; Ohtsu, Kanshi; Kanamori, Yasuo; Tagami, Minoru; Kume, Atsushi; Shiohara, Yuh; Tanaka, Shoji;
Assignee: International Superconductivity Technology Center (JP); Hitachi Cable Ltd. (JP); Hokkaido Electric Power Co., Inc. (JP); Kyushu Electric Power Co., Inc. (JP); The Kansai Electric Power Co., Inc., (JP); Fujikura, Ltd. (JP)
Primary Examiner: Yamnitzky; Marie
Assistant Examiner:
Attorney, Agent or Firm: Lorusso & Loud
A composite material is disclosed which includes a substrate, an oriented film provided on a surface of the substrate and formed of a crystal of a Y123 metal oxide of the formula LnBa.sub.2 Cu.sub.3 O.sub.y wherein Ln stands for Y or an element belonging to the lanthanoid and y is a number of 6-7, and a layer of a Y123 metal oxide of the formula LnBa.sub.2 Cu.sub.3 O.sub.y wherein Ln stands for Y or an element belonging to the lanthanoid and y is a number of 6-7 formed on the oriented film. |
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DETAILED DESCRIPTION It is, therefore, an object of the present invention to provide a composite material having a Y123 metal oxide crystal layer grown on a thin Y123 metal oxide film and having excellent crystallinity and crystal orientation.
It is another object of the present invention to provide a method for preparing such a composite material.
In accomplishing the foregoing objects, there is provided in accordance with one aspect of the present invention a composite material comprising a substrate, an oriented film provided on a surface of said substrate and formed of a metal oxide which has a crystal structure of a Y123 metal oxide and which has the formula: LnBa.
sub.
2 Cu.
sub.
3 O.
sub.
y wherein Ln stands for Y or an element belonging to the lanthanoid and y is a number of 6-7, and a layer of a metal oxide crystal provided over a surface of said oriented film and having the formula: LnBa.
sub.
2 Cu.
sub.
3 O.
sub.
y wherein Ln stands for Y or an element belonging to the lanthanoid and y is a number of 6-7.
In another aspect, the present invention provides a method of producing a composite material having a layer of a first metal oxide having the formula: LnBa.
sub.
2 Cu.
sub.
3 O.
sub.
y wherein Ln stands for Y or an element belonging to the lanthanoid and y is a number of 6-7, said method comprising the steps of: providing a seed material including a substrate, and an oriented film having a thickness of 0.
01-1 .
mu.
m and provided over a surface of said substrate, said oriented film being formed of a second metal oxide which has a crystal structure of a Y123 metal oxide and which has the formula: LnBa.
sub.
2 Cu.
sub.
3 O.
sub.
y wherein Ln stands for Y or an element belonging to the lanthanoid and y is a number of 6-7; and contacting said oriented film with a liquid phase which contains a melt composed of Cu, Ba and O and in which a solid phase is present at a position separated by said liquid phase from the position at which said oriented film contacts said liquid phase, said solid phase providing said liquid phase with solutes which constitute said first metal oxide so that said solutes are transported to the position at which said oriented film and said liquid phase contact, thereby permitting said first metal oxide to grow on said oriented film as primary crystals
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Electrical and Wave 
