4-fold enhancement in the critical current density of YBa2Cu3O7 films by practical ion irradiation

被引：43

作者：

Matsui, H. ^{[1
]}

Ogiso, H. ^{[1
]}

Yamasaki, H. ^{[1
]}

Kumagai, T. ^{[1
]}

Sohma, M. ^{[1
]}

Yamaguchi, I. ^{[1
]}

Manabe, T. ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 23期

关键词：

TEMPERATURE-DEPENDENCE; COATED CONDUCTORS; COLUMNAR DEFECTS; HEAVY-IONS; IDENTIFICATION; VORTICES; FIELD;

D O I：

10.1063/1.4769836

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report an up-to-4-fold enhancement in the in-magnetic-field critical current density at 77K of epitaxial YBa2Cu3O7 films on CeO2-buffered SrTiO3 substrates by 3-MeV Au2+ irradiation. This indicates that irradiation using an industrially practical ion beam, which generally has kinetic energy less than 5 MeV, can provide a substantial increase in the in-field current performance of high-temperature superconductor films. Transmission electron microscopy results show that point-like defects smaller than 6 nm in diameter were created in the films by the irradiation. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4769836]

引用

页数：4

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