REVERSIBLE PHOTOSTRUCTURAL CHANGE IN OXYGEN-DEFICIENT YBA2CU3O-GAMMA

被引：36

作者：

KAWAMOTO, K

HIRABAYASHI, I

机构：

[1] Superconductivity Research Laboratory, Nagoya Division, International Superconductivity Technology Center, Atsuta-ku, Nagoya 456, 2-4-1, Mutsuno

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.49.3655

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Recently, several kinds of photoinduced effects on superconducting properties of YBa2Cu3Oy at low temperatures have been reported. Particularly, in the sample at the boundary of a superconducting-semiconducting transition, a large decrease in the resistivity after laser irradiation has been observed at low temperatures. The decreased resistivity was recovered by room-temperature annealing. To clarify the mechanism of these effects, we have investigated the hysteretic behavior of resistivity near room temperature and the photoirradiation effect on the x-ray-diffraction pattern at low temperatures. We explain this effect as a photostructural change involving oxygen rearrangement in the Cu-O basal planes induced by irradiation at low temperatures. This is similar to the mechanism whereby a recombination-enhanced defect reaction is observed in ionic crystals and semiconductors.

引用

页码：3655 / 3658

页数：4

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