CHANGES OF SUPERCONDUCTIVITY AND CRYSTAL-STRUCTURE ON BA2YCU3O7-X BY 1 MEV AR+ ION IRRADIATION

被引：10
作者：
TERAI, T
FURUTA, T
MASEGI, T
KUSAGAYA, K
TAKAHASHI, Y
机构：
[1] Department of Nuclear Engineering, University of Tokyo, Hongo, Bunkyo-ku, Tokyo
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1991年 / 30卷 / 4B期
关键词：
SUPERCONDUCTOR; BA2YCU3O7-X; THIN FILM; AR+ IRRADIATION; CRITICAL CURRENT DENSITY; CRITICAL TEMPERATURE;
D O I：
10.1143/JJAP.30.L728
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Effects of 1 MeV Ar+ ion irradiation on thin films of high-T(c) oxide superconductor Ba2YCu3O7-x (BYCO) were investigated in the fluence range between 1.7 x 10(10) ions/cm2 and 9.9 x 10(13) ions/cm2. Increase of transport critical current density (J(c)) by irradiation was observed with a fluence below 1.3 x 10(11) ions/cm2, while the critical temperature (T(c)) was unchanged in this fluence region. With a fluence above 3.4 x 10(11) ions/cm2, both T(c) and J(c) decreased with increasing fluence. Regarding the change of the crystal structure, expansion of the c-axis lattice constant and an increase of full width at half maximum(FWHM) value of the peak in X-ray diffraction were observed above a fluence of 1.0 x 10(13) ions/cm2. These results suggest that the radiation induced defects act as pinning centers in the low fluence region, and they cause the destruction of the crystal structure in the high fluence region.
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收藏
页码：L728 / L731
页数：4
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