UNSPECIFIED (2003) Structural matching of ferroelectric domains and associated distortion in potassium titanyl phosphate crystals. JOURNAL OF PHYSICS-CONDENSED MATTER, 15 (10). pp. 1613-1624. ISSN 0953-8984

Full text not available from this repository.

Abstract

The surface deformation and atomic-level distortions associated with crystal structural matching at ferroelectric inversion domain walls are investigated in periodically poled potassium titanyl phosphate (KTP) crystals. A deformation, of the order of 10(-8) m in scale and having the periodicity of the domains, is observed at the surfaces by optical interferometry. It is discussed in terms of the piezoelectric effect. The matching of the crystal structures at the domain walls is studied by combining the hard x-ray Fresnel phase-imaging technique with Bragg diffraction imaging methods ('Bragg-Fresnel imaging') and using synchrotron radiation. Quantitative analysis of the contrast of the Bragg-Fresnel images recorded as a function of the propagation distance is demonstrated to allow the determination of how the domains are matched at the atomic (unit cell) level, even though the spatial resolution of the images is on the scale of micrometres. The atom P(1) is determined as the linking atom for connecting the inversion domains across the wall in KTP crystals for domain walls forced by electric-field processing to be parallel to (100). In addition to this, it is shown that a shift of 1/2(a+b) between atoms in the original and inverted structures is introduced as a result of the domain inversion operation.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	JOURNAL OF PHYSICS-CONDENSED MATTER
Publisher:	IOP PUBLISHING LTD
ISSN:	0953-8984
Date:	19 March 2003
Volume:	15
Number:	10
Number of Pages:	12
Page Range:	pp. 1613-1624
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/9853

Data sourced from Thomson Reuters' Web of Knowledge

Request changes to a record

Actions (login required)

View Item