Abstract

The fine structure of YBa₂Cu₃O_y single crystals with a different oxygen content subjected to a low-temperature hydrogenation have been investigated by transmission electron microscopy. It has been shown that as a result of the action of hydrogen at T = 150°С, a partial reduction of copper occurs, accompanied by the precipitation of Cu crystallites of ~100 nm in size and the formation of various structural defects. The geometric configuration of the precipitated crystallites has been considered. The results obtained show that hydrogenation is a method that makes it possible to control the structure by introducing nanosized inclusions and defects, which can be pinning centers of the magnetic vortices.

中文翻译：

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YBa 2 Cu 3 O y单晶氢化后形成的结构缺陷

摘要

通过透射电子显微镜研究了具有不同氧含量的YBa ₂ Cu ₃ O _y单晶在低温氢化下的精细结构。已经表明，由于氢在T = 150°C下的作用，发生了铜的部分还原，伴随着〜100 nm尺寸的Cu微晶的析出和各种结构缺陷的形成。已经考虑了沉淀的微晶的几何构型。所得结果表明，氢化是一种通过引入纳米级夹杂物和缺陷来控制结构的方法，这些杂物和缺陷可能是磁涡旋的固定中心。