@article{ramos_magnetotransport_2006,
	title = {Magnetotransport properties of {Fe3O4} epitaxial thin films: {Thickness} effects driven by antiphase boundaries},
	volume = {100},
	abstract = {We present an in-depth study of the magnetotransport properties of epitaxial Fe3O4 films as a function of film thickness. The films, grown on alpha-Al2O3(0001) single crystals by atomic-oxygen assisted molecular beam epitaxy, exhibit high structural order and abrupt interfaces. These films contain antiphase boundaries (APBs), the density of which is strongly dependent on film thickness. A series of resistivity and magnetoresistance measurements demonstrate a systematic evolution of these properties with decreasing film thickness, revealing the impact of APBs on the transport properties in the films. We present a model based on the spin-polarized transport across an antiferromagnetically coupled APB in order to successfully reproduce our experimental data over a large range of applied magnetic fields. The comparison of this model with experimental results further clarifies the mechanism of the anomalous magnetotransport behavior in Fe3O4. (c) 2006 American Institute of Physics.},
	number = {10},
	journal = {Journal Of Applied Physics},
	author = {Ramos, A. V and Moussy, J. B and Guittet, M. J and Bataille, A. M and Gautier-Soyer, M. and Viret, M. and Gatel, C. and Bayle-Guillemaud, P. and Snoeck, E.},
	month = nov,
	year = {2006},
	keywords = {ASSISTED, BEHAVIOR;, CONDUCTION;, FE3O4;, GROWTH;, MAGNETITE, MBE, MEMORY;, PHASE, TRANSITION;, VERWEY, magnetoresistance;},
	pages = {103902},
}

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The films, grown on alpha-Al2O3(0001) single crystals by atomic-oxygen assisted molecular beam epitaxy, exhibit high structural order and abrupt interfaces. These films contain antiphase boundaries (APBs), the density of which is strongly dependent on film thickness. A series of resistivity and magnetoresistance measurements demonstrate a systematic evolution of these properties with decreasing film thickness, revealing the impact of APBs on the transport properties in the films. We present a model based on the spin-polarized transport across an antiferromagnetically coupled APB in order to successfully reproduce our experimental data over a large range of applied magnetic fields. The comparison of this model with experimental results further clarifies the mechanism of the anomalous magnetotransport behavior in Fe3O4. 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