Na1/2Bi1/2VO3 and K1/2Bi1/2VO3: New Lead-Free Tetragonal Perovskites with Moderate c/ a Ratios

Hajime Yamamoto; Takahiro Ogata; Satyanarayan Patel; Jurij Koruza; Jürgen Rödel; Atanu Paul; Tanusri Saha-Dasgupta; Yuki Sakai; Mitsuru Itoh; Masaki Azuma

doi:10.1021/acs.chemmater.8b02379

Na_1/2Bi_1/2VO₃ and K_1/2Bi_1/2VO₃: New Lead-Free Tetragonal Perovskites with Moderate c/ a Ratios

Hajime Yamamoto
, Takahiro Ogata
, Satyanarayan Patel
, Jurij Koruza
, Jürgen Rödel
, Atanu Paul
, Tanusri Saha-Dasgupta
, Yuki Sakai
, Mitsuru Itoh
, Masaki Azuma

Institute of Science Tokyo
Tohoku University
Technische Universität Darmstadt
Indian Association for the Cultivation of Science
Kanagawa Institute of Industrial Science and Technology

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

New lead-free tetragonal perovskites Na_1/2Bi_1/2VO₃ and K_1/2Bi_1/2VO₃ 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, P_S, were 1.085 and 108 μC/cm², respectively (73 μC/cm² by the point charge model), for Na_1/2Bi_1/2VO₃ and 1.054 and 92 μC/cm², respectively (56 μC/cm² by the point charge model), for K_1/2Bi_1/2VO₃, 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.

Original language	English
Pages (from-to)	6728-6736
Number of pages	9
Journal	Chemistry of Materials
Volume	30
Issue number	19
DOIs	https://doi.org/10.1021/acs.chemmater.8b02379
State	Published - 9 Oct 2018
Externally published	Yes

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© 2018 American Chemical Society.

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title = "Na1/2Bi1/2VO3 and K1/2Bi1/2VO3: New Lead-Free Tetragonal Perovskites with Moderate c/ a Ratios",

abstract = "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.",

author = "Hajime Yamamoto and Takahiro Ogata and Satyanarayan Patel and Jurij Koruza and J{\"u}rgen R{\"o}del and Atanu Paul and Tanusri Saha-Dasgupta and Yuki Sakai and Mitsuru Itoh and Masaki Azuma",

note = "Publisher Copyright: {\textcopyright} 2018 American Chemical Society.",

year = "2018",

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doi = "10.1021/acs.chemmater.8b02379",

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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

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.

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SN - 0897-4756

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JO - Chemistry of Materials

JF - Chemistry of Materials

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ER -

Na_1/2Bi_1/2VO₃ and K_1/2Bi_1/2VO₃: New Lead-Free Tetragonal Perovskites with Moderate c/ a Ratios

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