| Autor: |
Troyanchuk, I. O., Karpinskiĭ, D. V., Chobot, A. N., Voĭitsekhovich, D. G., Dobryanskiĭ, V. M. |
| Předmět: |
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| Zdroj: |
JETP Letters; 10/1/2006, Vol. 84 Issue 3, p151-155, 5p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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