Influence of Step-edge induced antiphase boundary density on the magnetoresistance behavior of epitaxial Fe3O4 thin films. Issue 194 (22nd November 2018)

• Record Type: Journal Article
• Authors: Arora, Sunil Kumar; Shvets, Igor V.
• Is Part Of: Integrated ferroelectrics. Issue 194(2018)
• Page Start: 43
• Page End: 49
• Publication Date: 2018-11-22
• Subjects: Magnetite -- vicinal surface -- magnetoresistance -- epitaxy; Ferroelectric devices -- Periodicals; Integrated circuits -- Periodicals; 537.244805
• DOI: 10.1080/10584587.2018.1514883
• Languages: English
• ISSNs: 1058-4587

Abstract

Abstract: We have studied the influence of step-edge (SE) induced antiphase-boundaries (APB) density on the magnetoresistance (MR) behavior of epitaxial magnetite (Fe3 O4 ) films. The APB density was varied through the step-terrace periodicity of vicinal MgO (100) surface (miscut angle between 1 and 5°). The contribution from the SEs induced APBs on the MR, ΔMR, in Fe3 O4 films increases with the decrease in temperature and peaks at the Verwey transition. Magnitude of the ΔMR is found to increase with miscut angle (up to 2°) and decreases for larger miscut angles, which is related to the influence of APB related strain-fields on the degree of spin-polarization of Fe3 O4 regions on terraces.