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Issue 42, 2016
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Anti-phase boundary free two-dimensional epitaxial Fe3O4 thin films: evidence of an unquenched orbital magnetic moment at room temperature

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Abstract

Two-dimensional (2-D) epitaxial ferrimagnetic Fe3O4 thin films are attractive choices for the next generation of spin devices due to their half-metallicity, high Curie temperature and high electrical conductivity. Despite having profound spin device compatibility, the use of Fe3O4 thin films has not been exploited to date due to the presence of a magnetic disorder known as anti-phase boundaries (APBs). Here we demonstrate the growth of 2D single crystalline APB free Fe3O4(100) thin films on TiN buffered Si(100). The epitaxial orientation relationship, Si(400)//TiN(200)//Fe3O4(400), was confirmed by reflection high-energy electron diffraction and polarized Raman analysis. The Fe3O4(100) thin films possess large in-plane magnetic domains in its remanent magnetization state and cubic in-plane magnetic anisotropy as confirmed using magnetic force microscopy and magneto-optic Kerr effect measurements, respectively. The orbital to spin angular moment ratio, ml/ms = 0.144, and the total magnetic moment extracted from X-ray magnetism circular dichroism (XMCD) measurements are close to the corresponding bulk value.

Graphical abstract: Anti-phase boundary free two-dimensional epitaxial Fe3O4 thin films: evidence of an unquenched orbital magnetic moment at room temperature

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Publication details

The article was received on 26 Aug 2016, accepted on 02 Oct 2016 and first published on 03 Oct 2016


Article type: Communication
DOI: 10.1039/C6TC03700C
Citation: J. Mater. Chem. C, 2016,4, 9942-9946
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    Anti-phase boundary free two-dimensional epitaxial Fe3O4 thin films: evidence of an unquenched orbital magnetic moment at room temperature

    A. Kumar, S. Jana, P. Svedlindh, S. K. Sharma, S. Chaudhary and D. K. Pandya, J. Mater. Chem. C, 2016, 4, 9942
    DOI: 10.1039/C6TC03700C

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