No. 20022 Deposited with http://cryst.instr.yamaguchi-u.ac.jp/20022
Journal: Ferroelectrics, Vol.269, pp.321-326.
Title:@Thermal Motion in Sodium Nitrite: the Temperature Dependence of Debye-Waller Factors
Authors: *Yukihiko KAWAMURA, Naoyuki NITTA, Hironobu KASANO and Hiroyuki MASHIYAMA
Affiliation: Department of Physics, Faculty of Science, Yamaguchi University, Yamaguchi 753-8512
(Received November 24, 2001)
Abstract:
In order to understand the relation between the transition mechanism and the thermal vibration, the temperature dependence of the Debye-Waller factor is investigated in NaNO2 by single-crystal X-ray diffractometry. The crystal parameters are refined by least squaires calculations both in paraelectric and ferroelectric phases. The maximum entropy method is also employed to estimate the spontaneous polarization. The Debye-Waller factor displays a minor anomaly at the order-disorder transition point. The result is compared with K2SeO4, a typical displacive crystal.
Keywords: Debye-Waller factor; order-disorder/displacive type; Sodium Nitrite; structure analysis; least squares calculation; maximum entropy method
* Corresponding author, e-mail: b4342@sty.cc.yamaguchi-u.ac.jp
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