TY - JOUR
T1 - Modulations in relaxor nature due to Sr2+ doping in 0.68PMN-0.32PT ceramic
AU - Augustine, Pius
AU - Miryala, Muralidhar
AU - Samanta, Shibnath
AU - Kumar Naik, S. Pavan
AU - Sethupathi, K.
AU - Murakami, Masato
AU - Ramachandra Rao, M. S.
N1 - Funding Information:
MSR would like to thank (i) Department of Science and Technology (DST) , New Delhi for providing the funding ( SR/NM/NAT/02–2005 ) that facilitated the establishment of Nano Functional Materials Technology Centre (NFMTC), IIT Madras and (ii) DRDO , India for the (Project No: PHY/13–14/286/DRDO/MSRA ), which facilitated the financial support and experimental facilities required to carry out major part of this work. The paper was partly supported by the Japan Student Services Organization , through Shibaura Institute of Technology (SIT) , under the Top Global University Project, designed by the Ministry of Education, Culture, Sports, Science, and Technology of Japan .
Publisher Copyright:
© 2019 Elsevier Ltd and Techna Group S.r.l.
PY - 2020/4/1
Y1 - 2020/4/1
N2 - Substitution of alkali earth metal ion of Sr2+, in the Pb2+ site of Pb(Mg1/3Nb2/3)O3–PbTiO3 is expected to induce functional modulations in the system. Doping of 4 at.% of Sr2+ in 0.68PMN-0.32PT was carried out to lower the transition temperature, and to investigate the intended ferroelectric and dielectric variations. Excellent relaxor property was observed in the doped sample without appreciable reduction in remnant polarization. Doping with Sr2+ led to a reduction in transition temperature from 165 °C to 117 °C. Doped sample exhibited remnant polarization Pr = 16.2 μC/cm2, Squareness factor (Rsq) = 1.05 and Relaxor exponent (γ) around 2. Modulation in the functional response was exhibited by the doped composition, having low transition temperature, and its prospect in electrocaloric applications was analyzed.
AB - Substitution of alkali earth metal ion of Sr2+, in the Pb2+ site of Pb(Mg1/3Nb2/3)O3–PbTiO3 is expected to induce functional modulations in the system. Doping of 4 at.% of Sr2+ in 0.68PMN-0.32PT was carried out to lower the transition temperature, and to investigate the intended ferroelectric and dielectric variations. Excellent relaxor property was observed in the doped sample without appreciable reduction in remnant polarization. Doping with Sr2+ led to a reduction in transition temperature from 165 °C to 117 °C. Doped sample exhibited remnant polarization Pr = 16.2 μC/cm2, Squareness factor (Rsq) = 1.05 and Relaxor exponent (γ) around 2. Modulation in the functional response was exhibited by the doped composition, having low transition temperature, and its prospect in electrocaloric applications was analyzed.
KW - Dielectric properties
KW - Ferroelectric properties
KW - Functional applications
KW - Perovskites
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U2 - 10.1016/j.ceramint.2019.11.012
DO - 10.1016/j.ceramint.2019.11.012
M3 - Article
AN - SCOPUS:85075475418
SN - 0272-8842
VL - 46
SP - 5658
EP - 5664
JO - Ceramics International
JF - Ceramics International
IS - 5
ER -