Geometrically defined spin structures in ultrathin Fe₃O₄ with bulk like magnetic properties
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2018
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Royal Society of Chemistry
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Abstract
We have grown high quality magnetite microcrystals free from antiphase boundaries on Ru(0001) by reactive molecular beam epitaxy, conserving bulk magnetic properties below 20 nm thickness. Magnetization vector maps are obtained by X-ray spectromicroscopy and compared with micromagnetic simulations. The observed domain configurations are dictated purely by shape anisotropy, overcoming the possible influences of (magneto) crystalline anisotropy and defects, thus demonstrating the possibility of designing spin structures in ultrathin, magnetically soft magnetite at will.
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© The Royal Society of Chemistry 2018.
This work is supported by the Spanish Ministerio de Economía y Competitividad through Projects no. MAT2013- 48009-C4-1-P, MAT2014-52477-C5-2-P, MAT2015-64110-C2-1-P, and MAT2015-64110-C2-2-P and by the European Comission through Project H2020 no. 720853 (Amphibian). These experiments were performed at the CIRCE beamline of the ALBA Synchrotron Light Facility. I. P. acknowledges the EU via the innovation program under grant agreement no. 696656 (GrapheneCore1-Graphene-based disruptive technologies).