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Temperature and hydrostatic pressure dependence of vibrational modes in PbTi 1–x Zr x O 3
Author(s) -
Bäuerle D.,
Holzapfel W. B.,
Pinczuk A.,
Yacoby Y.
Publication year - 1977
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220830110
Subject(s) - raman spectroscopy , orthorhombic crystal system , antiferroelectricity , hydrostatic pressure , phase transition , phase (matter) , spectral line , hydrostatic equilibrium , chemistry , crystallography , analytical chemistry (journal) , materials science , crystal structure , condensed matter physics , thermodynamics , physics , ferroelectricity , optics , optoelectronics , organic chemistry , chromatography , quantum mechanics , astronomy , dielectric
The room temperature Raman spectra of PbTi 0.1 Zr 0.9 O 3 at hydrostatic pressures up to 68.5 kbar indicate three phase transitions. At 5.71 kbar a new phase appears, most probably the rhombo‐hedral high‐temperature phase, F R(HT) which is in coexistence with the rhombohedral low‐temperature phase F R(HT) . Between 8 and 9.1 kbar the relative intensities of all lines change and two additional structures appear. It is likely that this change is due to a transition into the orthorhombic antiferroelectric phase. A further transition between 39.7 and 42 kbar cannot be positively interpreted on the basis of the present data. The temperature dependence of the Raman spectra gives evidence that the additional structure in the F R(LT) phase is due to the doubling of the unit cell, i.e. PbTi 1–x Zr x O 3 seems to show one‐mode behaviour.