Structural parameters determining the transition temperature of tetragonal KH2PO4-type crystals


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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/14409

Title:	Structural parameters determining the transition temperature of tetragonal KH2PO4-type crystals
Authors:	Ichikawa, M. Browse this author
	Amasaki, D. Browse this author
	Gustafsson, T. Browse this author
	Olovsson, I. Browse this author
Issue Date:	1-Sep-2001
Publisher:	American Physical Society
Journal Title:	Physical Review. B
Volume:	64
Issue:	10
Start Page:	100101
Publisher DOI:	10.1103/PhysRevB.64.100101
Abstract:	A systematic study of the structural parameters determining the ferroelectric phase transition temperature Tc in tetragonal KH2PO4 (KDP)-type crystals MH2XO4 has been performed by searching the correlation between different structural parameters and Tc. It has been revealed that the transition temperature is determined not only by the hydrogen-bond distance R, as reported earlier, but also by the distortion of XO4 (via O-X-O angle α1) and the packing of M and XO4 along the c axis (via the rotation angle θ around the c axis); α1 reflects the dipole moment of XO4 and θ may influence the amplitude of optical vibration of M and XO4. The contribution of each structural part to the transition temperature Tc in the tetragonal KDP family has been revealed in a comprehensive way for ferroelectrics.
Rights:	Copyright © 2001 The American Physical Society
Rights:	http://www.aps.org/
Type:	article
URI:	http://hdl.handle.net/2115/14409
Appears in Collections:	理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 市川瑞彦

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