Growth twins in Bi2Ca1Sr2Cu2O8 superconductor single crystals
1990 ◽
Vol 5
(5)
◽
pp. 909-912
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Keyword(s):
X Ray
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Large-scale twin structures in single crystal Bi2Ca1Sr2Cu2O8 (2122) are reported for the first time. Symmetrical 90° (i.e., a-b) twins with a [110] type twin boundary were observed. A characteristic layer-growth morphology and jagged twin walls suggest that twin formation occurred layer by layer during crystal growth; i.e., the twins were growth twins. Hot-stage optical microscopy, x-ray diffraction, and electron microscopy results are discussed with reference to twin morphology.