J.Y. Buzaré, W. Berlinger, et al.
Ferroelectrics
We show that a suitable electron paramagnetic resonance experiment can discriminate sufficiently against the predominantly harmonic fluctuations characterizing a system undergoing a displacive phase transition, that a cluster-induced order-disorder component of the local behavior is exposed. We find evidence that, at Tc, the oxygen octahedra in SrTiO3 oscillate about quasiequilibrium positions displaced by, typically, ±0.22Â from the high-symmetry site. This result provides quantitative understanding of the incomplete softening of the phonon mode. © 1979 The American Physical Society.
J.Y. Buzaré, W. Berlinger, et al.
Ferroelectrics
E. Siegel, K.A. Müller
Physical Review B
R.K. Kremer, E. Sigmund, et al.
Zeitschrift für Physik B Condensed Matter
J. Mannhart, D. Anselmetti, et al.
Zeitschrift für Physik B Condensed Matter