Dielectric anomaly and improper antiferroelectricity at the Jahn--Teller transitions in rare-earth vanadates
Dielectric anomaly and improper antiferroelectricity at the Jahn--Teller transitions in rare-earth vanadates
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Jahn--稀土钒酸盐中的泰勒转变的介电异常和不适当的反铁电性
DOI：
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发表时间：
1977
期刊：
影响因子：
--
通讯作者：
T. Sakudo
中科院分区：
文献类型：
--
作者：
H. Unoki;T. Sakudo
Dielectric measurements have been carried out on the single crystals of DyV${mathrm{O}}_{4}$, TbV${mathrm{O}}_{4}$, and TmV${mathrm{O}}_{4}$ through the Jahn-Teller transition temperatures. An anomalous increase of the dielectric susceptibility with temperature along the $c$ axis was observed for DyV${mathrm{O}}_{4}$, but not for TbV${mathrm{O}}_{4}$ and TmV${mathrm{O}}_{4}$. This behavior is explained as due to the antiferroelectricity driven by the soft ${B}_{1mathrm{g}}$ strain mode through the "sublattice piezoelectricity."
Dielectric measurements have been carried out on the single crystals of DyV${mathrm{O}}_{4}$, TbV${mathrm{O}}_{4}$, and TmV${mathrm{O}}_{4}$ through the Jahn-Teller transition temperatures. An anomalous increase of the dielectric susceptibility with temperature along the $c$ axis was observed for DyV${mathrm{O}}_{4}$, but not for TbV${mathrm{O}}_{4}$ and TmV${mathrm{O}}_{4}$. This behavior is explained as due to the antiferroelectricity driven by the soft ${B}_{1mathrm{g}}$ strain mode through the "sublattice piezoelectricity."