Twin structure of NiCr_2O_4 Single Crystal Due to Cooperative Jahn-Teller Distortion
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The tetragonal phase of nickel chromite (NiCr_2O_4) was investigated by X-ray diffraction method for single crystal. The {110} twin structure was found, below the transition temperature (29℃), as a result of the tetragonal domain formation due to the Jahn-Teller distortion. The twin angle was observed to vary in accord with the temperature dependence of c/a and to be about 1.1° and 1.6° at T=21℃ and T=-30℃, respectively.
- 社団法人日本物理学会の論文
- 1970-02-05
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