TY  - JOUR
AU  - Mihailova, Boriana
AU  - Waeselmann, Naemi
AU  - Maier, Bernd
AU  - Welsch, A.
AU  - Angel, Ross
AU  - Bismayer, Ulrich
TI  - Pressure-induced structural transformations in advanced ferroelectrics with relaxor behaviour
JO  - High pressure research
VL  - 33
IS  - 3
SN  - 0895-7959
CY  - London [u.a.]
PB  - Taylor and Francis
M1  - PUBDB-2014-04230
M1  - bmbf-projekt 05k13gu1
SP  - 595-606
PY  - 2013
N1  - © Taylor & Francis
AB  - A series of model perovskite-type relaxor ferroelectrics (pure and A-/B-site doped PbSc1/2Ta1/2O3 andPbSc1/2Nb1/2O3 as well as of 0.9PbZn1/3Nb2/3O3 − 0.1PbTiO3) were studied by high pressure diffractionand inelastic light scattering in order to elucidate the mesoscopic-scale ferroic atomic arrangementsresponsible for the superb macroscopic properties of these materials. The combined analysis of the pressureenhancedphonon anomalies observed by Raman spectroscopy and the pressure-induced long-range orderdetected by synchrotron X-ray and neutron diffraction revealed that at ambient conditions antiferrodistortiveorder coexists with the ferroelectric order on the mesoscopic scale. This suggests that the locallypolarized spatial nanoregions known as polar nanoregions are ferrielectric in nature and their abundanceand mean size depend on both the antiferrodistortive and ferroelectric coupling, which in turn can be tunedby appropriate chemical variations.
LB  - PUB:(DE-HGF)29 ; PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000327006700014
DO  - DOI:10.1080/08957959.2013.806499
UR  - https://bib-pubdb1.desy.de/record/192653
ER  -