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Unexpected Precursor Effects to the Structural Phase Transition in EuTiO 3
Author(s) -
BussmannHolder Annette,
Köhler Jürgen,
Whangbo MikeH.
Publication year - 2015
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201400596
Subject(s) - perovskite (structure) , mode (computer interface) , phase transition , phase (matter) , condensed matter physics , coupling (piping) , phase boundary , boundary (topology) , transverse plane , mode coupling , materials science , chemical physics , physics , optics , chemistry , crystallography , mathematics , mathematical analysis , quantum mechanics , computer science , engineering , composite material , structural engineering , operating system
The dynamical properties of EuTiO 3 are investigated to gain insight into its precursor effects analogous to those observed in many other perovskite oxides. In spite of the fact that a competition between the long wave length transverse optic mode and the zone boundary acoustic mode is absent, which makes the mode‐mode coupling inessential, acoustic instabilities on limited spatial regions appear well above T S . This confirms the notion that dynamic forerunners are inherent and precede any phase transition in cubic perovskite oxides.