F. La Mattina, J.G. Bednorz, et al.
Physical Review B - CMMP
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.
F. La Mattina, J.G. Bednorz, et al.
Physical Review B - CMMP
K.W. Blazey, K.A. Müller, et al.
Solid State Communications
J.G. Bednorz, M. Takashige, et al.
Materials Research Bulletin
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