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| Home > Publications database > Translation and orientation domain boundaries in La2/3Ca1/3MnO3 |
| Journal Article | PreJuSER-57549 |
;
2006
Taylor and Francis
London [u.a.]
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Please use a persistent id in citations: doi:10.1080/14786430500519780
Abstract: From crystal structure, three types of translation and two types of orientation domain boundaries are expected in La2/3Ca1/3MnO3 as a result of phase transition. However, the most easily observed domain boundaries in the bulk samples are [1/2 1/2 1/2] translation boundaries ( or antiphase boundaries) and 90 degrees domain boundaries, while the [1/2 0 1/2] and [0 1/2 0] translation boundaries were rarely observed. In this paper, this phenomenon is explained by considering the tilting modes of the oxygen octahedra in the structure. We found that there is no distortion to the nearby oxygen octahedra if the [1/2 1/2 1/2] translation boundaries take the ( 010) boundary planes and the 90 degrees domain boundaries are in the {101} planes, making them low-energy boundary planes and, thus, are easy to form. On the other hand, the [1/2 0 1/2] and [0 1/2 0] translation boundaries introduce a distortion in the oxygen octahedra, which requires breaking the tilting modes in the boundary areas and, therefore, they are high-energy boundary planes, which are rarely observed. The above-expected results are supported by our transmission electron microscopy data.
Keyword(s): J
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