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Oxide superconductor and method for manufacturing same

專(zhuān)利號(hào)
US12161054B2
公開(kāi)日期
2024-12-03
申請(qǐng)人
KABUSHIKI KAISHA TOSHIBA（JP Tokyo）
發(fā)明人
Takeshi Araki; Hirotaka Ishii
IPC分類(lèi)
H10N60/85; H10N60/01
技術(shù)領(lǐng)域
ybco,pr,region,in,coating,film,ococh3,oxide,perovskite,μm
地域： Tokyo

摘要

An oxide superconductor of an embodiment includes an oxide superconducting layer including a first superconducting region containing barium, copper, and a first rare earth element, having a continuous perovskite structure, and extending in a first direction, a second superconducting region containing barium, copper, and a second rare earth element, having a continuous perovskite structure, and extending in the first direction, and a non-superconducting region disposed between the first and the second superconducting region, containing praseodymium, barium, copper, and a third rare earth element, a ratio of the number of atoms of the praseodymium to a sum of the number of atoms of the third rare earth element and the number of atoms of the praseodymium which is 20% or more, having a continuous perovskite structure continuous with the perovskite structure of the first superconducting region and the perovskite structure of the second superconducting region, and extending in the first direction.

說(shuō)明書(shū)

In order to realize the application to the superconducting aircraft, it is necessary to fluctuate a magnetic field of at least one superconducting coil. That is, an alternating current (AC) inverting a current is used, or a magnetic field is changed by fluctuating a current value without inverting a current and thus a propulsion force is generated by the changed attractive force. When the magnetic field is changed over time by the fluctuation of the current value, a loss of an inductance component is caused. In the conventional superconducting applications, since a superconducting coil is fixed only on one side and a current value is constant, an energy loss of the inductance component is almost zero.

In the following description, an application in which the current is changed without being inverted and the inductance component becomes a problem is also referred to as an AC application. The loss caused by fluctuating the current value is often referred to as AC loss in the field of superconductivity. In the AC application of the superconductivity, a mechanism for reducing an energy loss due to the inductance component is required.

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