Reference : Separating the influence of electric charges in magnetic force microscopy images of i...

	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Materials science & engineering
	Focus Areas :	Physics and Materials Science
	To cite this reference:	http://hdl.handle.net/10993/41880

Title :	Separating the influence of electric charges in magnetic force microscopy images of inhomogeneous metal samples
Language :	English
Author, co-author :	Arenas, Mónica P. [Federal University of Rio de Janeiro > Department of Metallurgical and Materials Engineering > > ; > Laboratory of Nondestructive Testing, Corrosion and Welding]
	Martin Lanzoni, Evandro [> Brazilian Nanotechnology National Laboratory > > ; São Paulo State University]
	Pacheco, Clara J. [> Laboratory of Nondestructive Testing, Corrosion and Welding]
	Costa, Carlos A. R. [> Brazilian Nanotechnology National Laboratory]
	Eckstein, Carlos B. [Petrobras]
	de Almeida, Luiz H. [Federal University of Rio de Janeiro > Department of Metallurgical and Materials Engineering]
	Rebello, João M. A. [Federal University of Rio de Janeiro > Department of Metallurgical and Materials Engineering]
	Deneke, Christoph F. [University of Campinas > Gleb Wataghin Institute of Physics]
	Pereira, Gabriela R. [Federal University of Rio de Janeiro > Department of Metallurgical and Materials Engineering > > ; > Laboratory of Nondestructive Testing, Corrosion and Welding]
Publication date :	2018
Journal title :	Journal of Magnetism and Magnetic Materials
Volume :	446
Pages :	239--244
Peer reviewed :	Yes (verified by ORBilu)
ISSN :	0304-8853
Keywords :	[en] Kelvin probe force microscopy ; Aging ; Austenitic stainless steels ; Carbides ; Magnetic force microscopy ; Magnetic properties
Abstract :	[en] In this study, we investigate artifacts arising from electric charges present in magnetic force microscopy images. Therefore, we use two austenitic steel samples with different microstructural conditions. Furthermore, we examine the influence of the surface preparation, like etching, in magnetic force images. Using Kelvin probe force microscopy we can quantify the charges present on the surface. Our results show that electrical charges give rise to a signature in the magnetic force microscopy, which is indistinguishable from a magnetic signal. Our results on two differently aged steel samples demonstrate that the magnetic force microscopy images need to be interpreted with care and must be corrected due to the influence of electrical charges present. We discuss three approaches, how to identify these artifacts – parallel acquisition of magnetic force and electric force images on the same position, sample surface preparation to decrease the presence of charges and inversion of the magnetic polarization in two succeeding measurement.
Permalink :	http://hdl.handle.net/10993/41880
DOI :	10.1016/j.jmmm.2017.09.041
Other URL :	http://www.sciencedirect.com/science/article/pii/S0304885317320231
Mentions required by the publisher for OA :	All rights reserved

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