caa a22 4500 445363010 CHVBK 20180317142921.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10832-011-9644-9 doi (NATIONALLICENCE)springer-10.1007/s10832-011-9644-9 Pressure dependent phase transitions in (Pb,Ca)TiO3: Determination of structure using high pressure synchrotron X-ray and Raman studies [Elektronische Daten] [Amreesh Chandra, A. Tyagi, V. Vijaykumar, G. Mukherjee, R. Boehler] Pressure dependent studies on technologically important ferroelectric material Pb0.70Ca0.30TiO3 show the occurrence of a new hitherto unreported pressure dependent phase transition around 4GPa. In the pressure range 4-14GPa, the parent tetragonal (P4mm) phase of Pb0.70Ca0.30TiO3 transforms in to a monoclinic (Cm) phase before attaining its paraelectric cubic (Pm3m) phase around 15GPa. High pressure Raman studies reveal the presence of a critical pressure above which the ferroelectric phase starts to reappear in the paraelectric phase. This critical pressure is found to be much lower than the critical pressure observed in pure PbTiO3. Possible reasons for this lowering of the critical pressure are presented. Springer Science+Business Media, LLC, 2011 XRD nationallicence Phase transition nationallicence Raman nationallicence Ferroelectric nationallicence Chandra Amreesh Department of Physics and Meteorology, Indian Institute of Technology, 721302, Kharagpur, West Bengal, India aut Tyagi A. Chemistry Division, Bhabha Atomic Research Centre, 400 085, Mumbai, India aut Vijaykumar V. High Pressure Physics Division, Bhabha Atomic Research Centre, 400085, Mumbai, India aut Mukherjee G. Department of Physics, Indian Institute of Science Education and Research, 700106, Kolkata, West Bengal, India aut Boehler R. Hochdruck Mineralphysik, Max Planck Institute for Chemie, Postfach 3060, 55128, Mainz, Germany aut Journal of Electroceramics Springer US; http://www.springer-ny.com 26/1-4(2011-06-01), 191-199 1385-3449 26:1-4<191 2011 26 10832 https://doi.org/10.1007/s10832-011-9644-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10832-011-9644-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chandra Amreesh Department of Physics and Meteorology, Indian Institute of Technology, 721302, Kharagpur, West Bengal, India aut NATIONALLICENCE 700 1- Tyagi A. Chemistry Division, Bhabha Atomic Research Centre, 400 085, Mumbai, India aut NATIONALLICENCE 700 1- Vijaykumar V. High Pressure Physics Division, Bhabha Atomic Research Centre, 400085, Mumbai, India aut NATIONALLICENCE 700 1- Mukherjee G. Department of Physics, Indian Institute of Science Education and Research, 700106, Kolkata, West Bengal, India aut NATIONALLICENCE 700 1- Boehler R. Hochdruck Mineralphysik, Max Planck Institute for Chemie, Postfach 3060, 55128, Mainz, Germany aut NATIONALLICENCE 773 0- Journal of Electroceramics Springer US; http://www.springer-ny.com 26/1-4(2011-06-01), 191-199 1385-3449 26:1-4<191 2011 26 10832 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer