Reconstruction and charge ordering of epitaxial Fe3O4(001) films
Source abstract
Abstract
Abstract Surface structure and charge ordering of epitaxial Fe3O4(0 0 1) films grown on MgO(0 0 1) were studied by scanning tunneling microscopy. The film surface exhibited a (√2×√2)R45° reconstruction induced by ordered oxygen vacancies. The presence of cation rows running along the [1 1 0] direction revealed surface termination at B-sites. Within the cation rows, an atomic separation of 0.3 nm is resolved by using a W tip. By using a Ni tip, another feature of 1.2 nm periodic protrusions is observed on areas usually connected to surface defects such as steps and cation vacancies. These protrusions represented the static charge of Fe2+ and Fe3+ ions.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic properties of thin films · Surface and Thin Film Phenomena · Iron oxide chemistry and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (11)
Show source-provided references
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9. The films grow in a layer-by-layer mode as revealed by RHEED, but the surface shows a grainy-like feature. The detailed growth characteristic and the effect of annealing on surface structure and termination investigated by STM will be reported elsewhere.
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