Second order tetragonal-to-cubic phase transition in Sr0.5Ba0.5HfO3

Autor:	R. E. Alonso, A. R. López García, Alberto Caneiro, D. G. Lamas, C. M. Horowitz
Rok vydání:	2001
Předmět:	Diffraction Phase transition Condensed matter physics Chemistry General Chemistry Crystal structure Condensed Matter Physics Tetragonal crystal system Nuclear magnetic resonance Quadrupole Materials Chemistry Tensor Hyperfine structure Electric field gradient
Zdroj:	Solid State Communications. 120:205-210
ISSN:	0038-1098
DOI:	10.1016/s0038-1098(01)00356-8
Popis:	We report the crystal structure together with the electric field gradient (EFG) tensor at the Hf site in Sr 0.5 Ba 0.5 HfO 3 as a function of temperature. High-temperature X-ray diffraction data show a second-order tetragonal-to-cubic phase transition at 700 K. The hyperfine interaction measured at 181 Ta probe corresponds to a static, asymmetric and disordered EFG. The hyperfine parameters V zz and η also display evident changes close to 673 K confirming the phase transition observed by XRD. The line width of the quadrupole interaction is relatively small compared with other perovskite-type compounds.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::edf9bcb29a0b3d9ac831b70f89ab3839 https://doi.org/10.1016/s0038-1098(01)00356-8 Zobrazit plný text záznamu Full Text from ScienceDirect