Thermal Motion in Sodium Nitrite: The Temperature Dependence of Debye-Waller Factors

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 NaNO 2 by single-crystal X-ray diffractometry. The crystal parameters are refined by least squares calculations both in paraelectri...

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Bibliographic Details
Published in:Ferroelectrics 2002-01, Vol.269 (1), p.321-326
Main Authors: Kawamura, Y., Nitta, N., Kasano, H., Mashiyama, H.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Debye-Waller Factor
Dielectric, piezoelectric, ferroelectric and antiferroelectric materials
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Ferroelectricity and antiferroelectricity
Least Squares Calculation
Maximum Entropy Method
Order-disorder/displacive Type
Phase transitions and curie point
Physics
Sodium Nitrite
Structure Analysis
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Summary: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 NaNO 2 by single-crystal X-ray diffractometry. The crystal parameters are refined by least squares 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 K 2 SeO 4 , a typical displacive crystal.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150190211146