Magnetic properties of manganese ferrite films grown at atomic scale

Manganese ferrite is a partial inverse spinel which, when prepared by conventional growth techniques, has ∼ 20 % of the Mn 2 + ions on the octahedral sublattice. Here we describe a layer-by-layer growth scheme at atomic scale by which the percentage of Mn 2 + ions on the octahedral sublattice can be...

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Bibliographic Details
Published in:Journal of applied physics 2005-05, Vol.97 (10), p.10G103-10G103-3
Main Authors: Zuo, Xu, Yang, Aria, Yoon, Soack-Dae, Christodoulides, Joe A., Harris, Vincent G., Vittoria, Carmine
Format: Article
Language:English
Subjects:
ANISOTROPY
CATIONS
CHEMICAL COMPOSITION
CRYSTAL GROWTH
DEPOSITION
FERRITE
LAYERS
MAGNESIUM OXIDES
MAGNETIC PROPERTIES
MAGNETIZATION
MANGANESE COMPOUNDS
MANGANESE IONS
MATERIALS SCIENCE
OXYGEN
SPINELS
SUBSTRATES
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
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Summary:Manganese ferrite is a partial inverse spinel which, when prepared by conventional growth techniques, has ∼ 20 % of the Mn 2 + ions on the octahedral sublattice. Here we describe a layer-by-layer growth scheme at atomic scale by which the percentage of Mn 2 + ions on the octahedral sublattice can be artificially controlled. Manganese ferrite films grown by this technique exhibits different degrees of cation inversion when grown on {100} and {111} MgO substrates. It was observed that saturation magnetization varied in a wide range of values depending on chemical composition and oxygen pressure. Although bulk manganese ferrite was low anisotropy magnetic material, uniaxial anisotropy was observed at room temperature in the films deposited on {100} MgO substrates, and its magnitude and direction sensitively depended on chemical composition and oxygen pressure during deposition.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1849072