Characterization of magnetic properties of ultrathin CoFe2O4 films by utilizing magnetic proximity effect

Magnetic spinel oxides, including CoFe2O4 (CFO), have crucial applications in spintronics. They have excellent magnetic properties, such as high spin polarization and high Curie temperature, which enables the operation of spintronic devices at room temperature. Some interesting phenomena have also b...

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Bibliographic Details
Published in:Solid state communications 2020-02, Vol.306, p.113762, Article 113762
Main Authors: Nodo, S., Yamamoto, T., Yanase, T., Shimada, T., Nagahama, T.
Format: Article
Language:English
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Summary:Magnetic spinel oxides, including CoFe2O4 (CFO), have crucial applications in spintronics. They have excellent magnetic properties, such as high spin polarization and high Curie temperature, which enables the operation of spintronic devices at room temperature. Some interesting phenomena have also been discovered for interfaces consisting of spinel oxides and heavy metals. However, the magnetic properties of ultrathin CFO films have not been investigated sufficiently. In this report, a characterization of the magnetic properties of an ultrathin CFO film was performed by using the magnetic proximity effect (MPE) to observe the anomalous Hall effect (AHE) in Pt. The result was consistent with the measurement performed with magneto-optical effects. By fitting AHE with the Langevin function, it was concluded that these ultrathin films (tCFO
ISSN:0038-1098
1879-2766
DOI:10.1016/j.ssc.2019.113762