Polarized Raman spectra of tetragonal pure measured on epitaxial films
T Merle, R Guinebretiere, A Mirgorodsky, P Quintard - Physical Review B, 2002 - APS
T Merle, R Guinebretiere, A Mirgorodsky, P Quintard
Physical Review B, 2002•APSThe actual ambiguity in the interpretation of the Raman-active vibrations of tetragonal ZrO 2
is discussed as a factor impeding progress in long-standing investigations of the
polymorphism of zirconia. The reliable symmetry assignment of these vibrations is proposed
by analyzing a polarized light scattering from single-crystal grains of epitaxial films of pure t−
ZrO 2 grown on monocrystalline Al 2 O 3 samples. The interrelations between the Raman
spectrum of t− ZrO 2 and the relevant phonons of c− ZrO 2 are considered, implying the A 1 …
is discussed as a factor impeding progress in long-standing investigations of the
polymorphism of zirconia. The reliable symmetry assignment of these vibrations is proposed
by analyzing a polarized light scattering from single-crystal grains of epitaxial films of pure t−
ZrO 2 grown on monocrystalline Al 2 O 3 samples. The interrelations between the Raman
spectrum of t− ZrO 2 and the relevant phonons of c− ZrO 2 are considered, implying the A 1 …
Abstract
The actual ambiguity in the interpretation of the Raman-active vibrations of tetragonal ZrO 2 is discussed as a factor impeding progress in long-standing investigations of the polymorphism of zirconia. The reliable symmetry assignment of these vibrations is proposed by analyzing a polarized light scattering from single-crystal grains of epitaxial films of pure t− ZrO 2 grown on monocrystalline Al 2 O 3 samples. The interrelations between the Raman spectrum of t− ZrO 2 and the relevant phonons of c− ZrO 2 are considered, implying the A 1 g vibration as a soft mode driving the tetragonal-cubic transformation.
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