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Local ferroelectric switching properties in BiFeO3 microstructures and their piezomagnetic response

Published online by Cambridge University Press:  26 February 2011

Catalin Harnagea ,
Cristian Victor Cojocaru  and
Alain Pignolet
Catalin Harnagea
Affiliation:
harnagea@emt.inrs.ca, INRS-EMT, 1650 Lionel-Boulet, Varennes, QC, J3X1S2, Canada, 450-929-8146, 450-929-8102
Cristian Victor Cojocaru
Affiliation:
cojocaru@emt.inrs.ca, INRS-EMT, Canada
Alain Pignolet
Affiliation:
pignolet@emt.inrs.ca, INRS-EMT, Canada
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Abstract

We report here the successful fabrication of BiFeO3 (BFO) isolated micron-sized structures by pulsed laser deposition. The islands have a relatively constant aspect ratio (height/lateral size) of 0.1-0.3. We present their local ferroelectric characterization, using piezoresponse force microscopy (PFM), showing that the micron-sized BFO islands exhibit a strong piezoresponse and have ferroelectric domains with lateral sizes down to the 100 nm range. We also present here the first results of Magnetostriction Force Microscopy experiments performed on these structures. On ferromagnetic samples this method reveals a piezomagnetic or magnetostriction contrast, associated with magnetic domains. In our case, we show that the contrast can be associated to the magnetoelectric effect.

Keywords

piezoresponseferroelectricmagnetic properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 902: Symposium T – Ferroelectric Thin Films XIII , 2005 , 0902-T10-57
Copyright
Copyright © Materials Research Society 2006

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