Structural phase transition in d-benzil characterised by capacitance measurements and neutron powder diffraction

D.J. Goossens; Xiaodong Wu; M. Prior

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Structural phase transition in d-benzil characterised by capacitance measurements and neutron powder diffraction

机译：d-苯的结构相变以电容测量和中子粉末衍射为特征

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The ferroelectric phase transition in deuterated benzil, C_(14)H_(10)O_2, has been studied using capacitance measurements and neutron powder diffraction. Hydrogenous benzil shows a phase transition at 83.5 K from a high temperature P3_12_1 phase to a cell-doubled P2_1 phase. The phase transition in d-benzil occurs at 88.1 K, a small isotope effect. Neutron powder diffraction was consistent with a low temperature phase of space group P2_1. Upon deuteration the transition remained first-order and the dynamics of the phenyl ring dominated the behaviour. The isotope effect can be attributed to the difference in mass and moment of inertia between C_6H_5 and C_6D_5.

机译：利用电容测量和中子粉末衍射研究了氘代苯C_（14）H_（10）O_2中的铁电相变。氢苯甲腈在83.5 K时从高温P3_12_1相转变为双胞室P2_1相。 d-苯的相变发生在88.1 K，这是一个小的同位素效应。中子粉末衍射与空间群P2_1的低温相一致。氘化后，转变仍然是一阶的，苯环的动力学主导了这一行为。同位素效应可归因于C_6H_5和C_6D_5之间的质量和惯性矩的差异。

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来源
《Solid State Communications》 |2005年第10期|p.543-545|共3页
作者
D.J. Goossens; Xiaodong Wu; M. Prior;
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作者单位

Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia;

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原文格式 PDF
正文语种 eng
中图分类固体物理学;
关键词
A. Benzil; A. Deuterated ferroelectric; D. Structural phase transition;

机译：苯甲;A。氘化铁电体;D.结构相变;

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Structural phase transition in d-benzil characterised by capacitance measurements and neutron powder diffraction

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