Phase transformations in Pr1–x
Sr
x
CoO3 |
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Authors: | I O Troyanchuk D V Karpinskiĭ A N Chobot D G Voĭitsekhovich V M Dobryanskiĭ |
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Institution: | (1) Joint Institute of Solid State and Semiconductor Physics, National Academy of Sciences of Belarus, Minsk, 220072, Belarus;(2) Belarusian State Pedagogical University, Minsk, 220809, Belarus |
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Abstract: | The elastic properties and crystal structure of the Pr1?x Sr x CoO3 system are studied. Two types of crystal structure transitions are found. For the composition x = 0.5, the monoclinic phase transforms to a rhombohedral one in the high-temperature transition (T ≈ 310 K), while the unit cell symmetry remains monoclinic though the unit cell parameters change drastically in the low-temperature transformation (T ≈ 110 K). It is suggested that the high-temperature transition is caused by the dimensional effect, while the low-temperature transition is associated with the presence of praseodymium ions actively involved in chemical bonding. |
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Keywords: | |
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