UNSPECIFIED (1994) STRUCTURAL RESPONSE OF KTIOPO4 TO ELECTRIC-FIELDS - EFFECTS DUE TO LOW-FREQUENCY MODULATION. JOURNAL OF APPLIED PHYSICS, 76 (1). pp. 188-193. ISSN 0021-8979

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Abstract

A 290 mum slice of z-cut, flux-grown, KTiOPO4 was subjected to square-wave electric field modulation at 1 Hz and examined using synchrotron radiation and a differential energy-dispersive x-ray spectroscopy system. Asymmetric Laue reflections (h0h and h0hBAR) revealed the development of normally forbidden reflections (h odd) whose intensities grew until a threshold field of about 70 V/mm was reached, above which they disappeared. This effect was reversible and is interpreted as due to field-induced K+ ion disorder followed by domain reversal above a critical field with subsequent ordering. Symmetric Bragg reflections (00l) showed a dramatic effect: after a period of modulation, also at about 70 V/mm, the intensities began to fall and, at the same time, the peak widths began to narrow. This behavior resembles the transition from an ideally imperfect to an ideally perfect crystal and suggests that the crystal has been annealed electrically.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	JOURNAL OF APPLIED PHYSICS
Publisher:	AMER INST PHYSICS
ISSN:	0021-8979
Date:	1 July 1994
Volume:	76
Number:	1
Number of Pages:	6
Page Range:	pp. 188-193
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/20568

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