- Tytuł:
- Crystal structure of the high temperature phase of strontium barium niobate
- Autorzy:
-
Paszkowski, R.
Zubko, M.
Wokulska, K.
Kusz, J.
Dec, J. - Powiązania:
- https://bibliotekanauki.pl/articles/1058111.pdf
- Data publikacji:
- 2016-10
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
42.70.Mp
77.84.Dy
61.50.-f
71.55.Jv - Opis:
- Pure and undoped strontium-barium niobate Sr_{0.40}Ba_{0.60}Nb₂O₆ (SBN40) single crystals grown by the Czochralski method were investigated by single crystal X-ray diffraction methods. The study below T_{C} (429 K for SBN40) confirmed the structure with P4bm space group. Above this temperature the structure transforms into the paraelectric, centrosymmetric one with P4/mbm space group. Analysis of the recorded diffraction patterns allowed to observe several signs of crystal structure modulation. On the registered diffraction images satellite reflections were found. A modulation vector q=(δ,±δ,), where δ=0.3075(6) (at room temperature) was found and it was similar to that occurring in the SBN61. In addition, above the phase transition temperature on the (hk) planes with l integer a weak diffuse scattering was observed.
- Źródło:
-
Acta Physica Polonica A; 2016, 130, 4; 856-858
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł