Universität zu Köln

Alyabyeva, N., Ouvrard, A., Lindfors-Vrejoiu, I., Ageev, O. and McGrouther, D. (2017). Back-scattered electron visualization of ferroelectric domains in a BiFeO3 epitaxial film. Appl. Phys. Lett., 111 (22). MELVILLE: AMER INST PHYSICS. ISSN 1077-3118

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Abstract

Three-dimensional orientation of the ferroelectric (FE) domain structure of a BiFeO3 epitaxial film was investigated by scanning electron microscopy (SEM) using back-scattered electrons and piezoresponse-force microscopy (PFM). By changing the crystallographic orientation of the sample and the electron collection angle relative to the detector, we establish a link between the orientation of polarization vectors (out-of-plane and in-plane) in the BiFeO3 film and the back-scattered electron image contrast in agreement with PFM investigations. The different FE polarization states in the domains correspond to altered crystalline environments for the impingent primary beam electrons. We postulate that the resultant back-scattered electron domain contrast arises as a result of either differential absorption (through a channelling effect) or through back-diffraction from the sample, which leads to a projected diffraction pattern super-imposed with the diffuse conventional back-scattered electron intensity. We demonstrate that SEM can be sensitive for both out-of-plane and in-plane polarization directions using the back-scattered electron detection mode and can be used as a non-destructive and fast method to determine 3D FE polarization orientation of domains. Published by AIP Publishing.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Alyabyeva, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ouvrard, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lindfors-Vrejoiu, I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ageev, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED McGrouther, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-210917
DOI:	10.1063/1.4994180
Journal or Publication Title:	Appl. Phys. Lett.
Volume:	111
Number:	22
Date:	2017
Publisher:	AMER INST PHYSICS
Place of Publication:	MELVILLE
ISSN:	1077-3118
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PIEZORESPONSE FORCE MICROSCOPY; MULTIFERROIC BIFEO3; ROOM-TEMPERATURE; RESOLUTION; CRYSTALS Multiple languages Physics, Applied Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/21091