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Aso, Hiroki*; Toyosaki, Ayaka*; Asanuma, Noriko*; Takahatake, Yoko; Hoshino, Takanori; Watanabe, So; Watanabe, Masayuki; Matsuura, Haruaki*
no journal, ,
no abstracts in English
Matsuura, Haruaki*; Aso, Hiroki*; Toyosaki, Ayaka*; Asanuma, Noriko*; Takahatake, Yoko; Hoshino, Takanori; Watanabe, So; Watanabe, Masayuki
no journal, ,
Aso, Seiyu*; Yoneda, Yasuhiro; Matsuo, Hiroki*; Noguchi, Yuji*
no journal, ,
We have attempted to introduce positive chemical pressure into NaNbO by replacing Na
with a small Ca
. The superlattice reflections originating from the antiferroelectric P phase appeared both before and after the application of an electric field, which confirmed that a reversible electric-field-induced phase transition was achieved.
in high-temperature phaseAso, Seiyu*; Matsuo, Hiroki*; Noguchi, Yuji*; Yoneda, Yasuhiro; Morikawa, Daisuke*; Tsuda, Kenji*
no journal, ,
Recently, higher energy storage density than that of typical ferroelectric BaTiO has been achieved in NaNbO-based antiferroelectrics by utilizing the electric-field-induced phase transition between the antiferroelectric (AFE) and ferroelectric (FE) phases. In this study, we attempted to identify the space group using synchrotron X-ray diffraction and convergent electron diffraction in order to elucidate the full picture of the phase transition behavior in NaNbO and Ca-doped NaNbO. On the other hand, the Ca-doped sample showed that the space group is Pnma, which is consistent with the results obtained by convergent electron diffraction measurements.