X-Ray Study of Modulated Structure in [N(CH3)4]2CuCl4 under High Pressure

Takanao Asahi; Kouhei Izutsu

doi:10.1143/jpsj.72.330

Journal of the Physical Society of Japan

Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015

X-Ray Study of Modulated Structure in [N(CH₃)₄]₂CuCl₄ under High Pressure

Takanao Asahi, Kouhei Izutsu

著者情報

キーワード: [N(CH₃)₄]₂CuCl₄, incommensurate phase, modulated structure, pressure, phase transition, X-ray diffraction

ジャーナル認証あり

2003 年 72 巻 2 号 p. 330-334

DOI https://doi.org/10.1143/jpsj.72.330

詳細

抄録

Pressure–temperature dependence of modulation wavenumber of [N(CH₃)₄]₂CuCl₄ was measured with X-ray diffraction method in the region of 22≤T≤160°C, 0.25≤p≤0.95 GPa. Two commensurate phases with modulation wavenumber q=3⁄8 and 2⁄5 were found within the pressure-induced incommensurate phase. The phase q=3⁄8 is identified as the high-pressure ferroelectric phase F₂ found by Gesi.