TWINNING OF HIGH-Tc Ba2YCu3O7 - x OXIDES.

被引：0
|
作者：
Iijima, Sumio [1 ]
Ichihashi, Toshinari [1 ]
Kubo, Yoshimi [1 ]
Tabuchi, Junji [1 ]
机构：
[1] NEC Corp, Kawasaki, Jpn, NEC Corp, Kawasaki, Jpn
来源：
Japanese Journal of Applied Physics, Part 2: Letters | 1987年 / 26卷 / 09期
关键词：
BARIUM COMPOUNDS - Electric Conductivity - CERAMIC MATERIALS - CRYSTALS - Structure - MICROSCOPIC EXAMINATION - Scanning Electron Microscopy;
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摘要：
Orthorhombic crystallites of the high-T//c superconductor Ba//2YCu//3O//7// minus //x oxide prepared by the standard sintering technique are heavily laminated by twinning on (110) lattice planes. Upon heating these crystals under a vacuum in an electron microscope, the orthorhombic structure transformed irreversibly to a tetragonal one. Between these two forms, a transitional orthorhombic form was observed. This irreversible transformation seems to be caused by a lack of oxygen in the evacuated microscope.
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页码：1478 / 1481
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