TY - JOUR
T1 - Na1/2Bi1/2VO3 and K1/2Bi1/2VO3
T2 - New Lead-Free Tetragonal Perovskites with Moderate c/ a Ratios
AU - Yamamoto, Hajime
AU - Ogata, Takahiro
AU - Patel, Satyanarayan
AU - Koruza, Jurij
AU - Rödel, Jürgen
AU - Paul, Atanu
AU - Saha-Dasgupta, Tanusri
AU - Sakai, Yuki
AU - Itoh, Mitsuru
AU - Azuma, Masaki
N1 - Funding Information:
This work was partially supported by Grant-in-Aid for Scientific Research 16H02393 from the Japan Society for the Promotion of Science (JSPS) and by the Kanagawa Institute of Industrial Science and Technology. The synchrotron radiation experiments were performed at SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (2017B1697). S.P. is grateful for the support provided by an Alexander-von-Humboldt foundation fellowship. T.S.-D. and A.P. acknowledge the help of Subhadeep Bandyopadhyay with some of the DFT calculations.
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/10/9
Y1 - 2018/10/9
N2 - New lead-free tetragonal perovskites Na1/2Bi1/2VO3 and K1/2Bi1/2VO3 were synthesized under high pressure (6 GPa) and high temperature (1473 K), based on the design of materials optimizing the lone pair effect of the A-site ion and utilizing the Jahn-Teller effect in the B-site V4+. The magnitudes of the c/a ratio and spontaneous polarization, PS, were 1.085 and 108 μC/cm2, respectively (73 μC/cm2 by the point charge model), for Na1/2Bi1/2VO3 and 1.054 and 92 μC/cm2, respectively (56 μC/cm2 by the point charge model), for K1/2Bi1/2VO3, which are comparable to the well-known lead-based ferroelectric PbTiO3. This approach can guide the design of new lead-free ferroelectric and piezoelectric materials.
AB - New lead-free tetragonal perovskites Na1/2Bi1/2VO3 and K1/2Bi1/2VO3 were synthesized under high pressure (6 GPa) and high temperature (1473 K), based on the design of materials optimizing the lone pair effect of the A-site ion and utilizing the Jahn-Teller effect in the B-site V4+. The magnitudes of the c/a ratio and spontaneous polarization, PS, were 1.085 and 108 μC/cm2, respectively (73 μC/cm2 by the point charge model), for Na1/2Bi1/2VO3 and 1.054 and 92 μC/cm2, respectively (56 μC/cm2 by the point charge model), for K1/2Bi1/2VO3, which are comparable to the well-known lead-based ferroelectric PbTiO3. This approach can guide the design of new lead-free ferroelectric and piezoelectric materials.
UR - http://www.scopus.com/inward/record.url?scp=85053872757&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.8b02379
DO - 10.1021/acs.chemmater.8b02379
M3 - Article
AN - SCOPUS:85053872757
SN - 0897-4756
VL - 30
SP - 6728
EP - 6736
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 19
ER -