Magnetic Properties of Cobalt Ferrite (001) Films Grown on Spinel-Type Buffer Layers

Yuki Hisamatsu; Tomohiko Niizeki; Hideto Yanagihara; Eiji Kita

doi:10.1109/TMAG.2015.2448598

Magnetic Properties of Cobalt Ferrite (001) Films Grown on Spinel-Type Buffer Layers

Yuki Hisamatsu, Tomohiko Niizeki, Hideto Yanagihara, Eiji Kita

Research output: Contribution to journal › Article

Abstract

To improve the interface magnetism of Co_xFe_3-xO₄ (CFO) films that are grown on MgO substrates and exhibit extremely large perpendicular magnetic anisotropy, we attempted to insert two different spinel-type oxides [CoCr₂O₄ (CCO) and MgTi₂O₄ (MTO)] between the CFO films and their MgO(001) substrates. Although both buffer layers were epitaxially grown on MgO(001), the CFO films grown on CCO/MgO(001) became polycrystalline with a significantly lower level of magnetization, while the magnetization of the CFO films on MTO/MgO(001) fell as a function of the thickness of the MTO layer. A secondary ion mass spectroscopy analysis revealed a remarkable interdiffusion of Co and Mg.

Original language	English
Article number	7131553
Journal	IEEE Transactions on Magnetics
Volume	51
Issue number	11
DOIs	https://doi.org/10.1109/TMAG.2015.2448598
Publication status	Published - 2015 Nov 1

Keywords

Ferrite films
Magnetic anisotropy
Magnetostriction

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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Hisamatsu, Y., Niizeki, T., Yanagihara, H., & Kita, E. (2015). Magnetic Properties of Cobalt Ferrite (001) Films Grown on Spinel-Type Buffer Layers. IEEE Transactions on Magnetics, 51(11), [7131553]. https://doi.org/10.1109/TMAG.2015.2448598

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abstract = "To improve the interface magnetism of CoxFe3-xO4 (CFO) films that are grown on MgO substrates and exhibit extremely large perpendicular magnetic anisotropy, we attempted to insert two different spinel-type oxides [CoCr2O4 (CCO) and MgTi2O4 (MTO)] between the CFO films and their MgO(001) substrates. Although both buffer layers were epitaxially grown on MgO(001), the CFO films grown on CCO/MgO(001) became polycrystalline with a significantly lower level of magnetization, while the magnetization of the CFO films on MTO/MgO(001) fell as a function of the thickness of the MTO layer. A secondary ion mass spectroscopy analysis revealed a remarkable interdiffusion of Co and Mg.",

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