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Formation of a magnetite/hematite epitaxial bilayer generated with low energy ion bombardment



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Ruiz Gómez, Sandra and Serrano, A. and Carabias,, I. and Garcıa, M. A. and Hernando Grande, Antonio and Mascaraque Susunaga, Arantzazu and Pérez García, Lucas and González Barrio, Miguel Ángel and Rodríguez de la Fuente, Óscar (2017) Formation of a magnetite/hematite epitaxial bilayer generated with low energy ion bombardment. Applied physics letters, 110 (9). pp. 12-19. ISSN 0003-6951

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Official URL: http://dx.doi.org/10.1063/1.4977491


We have used a low-energy ion bombardment to fabricate an epitaxial single-crystalline magnetite/hematite bilayer grown on Au(111). This non-conventional fabrication method involves the transformation of the upper layers of a single-crystalline hematite thin film to single-crystalline magnetite, a process driven by the preferential sputtering of oxygen atoms and favoured by the good structural matching of both phases. We show the reversibility of the transformation between hematite and magnetite, always keeping the epitaxial and single- crystalline character of the films. The magnetic characterization of the bilayer grown using this method shows that the magnetic response is mainly determined by the magnetite thin film, exhibiting a high coercivity. Published by AIP Publishing.

Item Type:Article
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©American Institute of Physics.
This work was supported by projects MAT2012-38045- C04-03, FIS2014-61839-EXP, MAT2014- 52477-C5-2-P and MAT2013-48009-C4-1-P from the Spanish Ministry of Economy and Competitiveness and a 2016 BBVA Foundation Grant for Researchers and Cultural Creators. S.R.-G. thanks a FPI MINECO fellowship. J. Romero from the C.A.I de Tecnicas Fısicas-UCM is acknowledged for the SQUID measurements.

Uncontrolled Keywords:Iron-oxide films; Exchange bias; Thin-film; Transformation; Crystalline; Reduction; Titanium; Growth
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:42582
Deposited On:19 May 2017 14:03
Last Modified:11 Mar 2022 17:46

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