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Electronic structure and magnetic properties of (γ-Fe2O3/MgO)N multilayers

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Abstract

In this study, the electronic structure, chemical composition, and magnetic properties of multilayer ultrathin films of epitaxial maghemite (γ-Fe2O3/MgO)N were investigated. The multilayer structures of the (γ-Fe2O3/MgO)N ultrathin films were grown by molecular beam epitaxy (MBE) under ultrahigh vacuum on magnesium oxide substrates with different numbers of layers (where the number of layers, N = 2, 4, and 6). X-ray photoemission measurement (XPS) showed that the multilayer oxide films possessed only a single phase of maghemite γ-Fe2O3 with full stoichiometry. The magnetic moment of all of the multilayer samples showed ferromagnetic behavior, with magnetizations close to the bulk value of γ-Fe2O3, which has not been previously observed or considered. Moreover, the magnetization increased as the number of layers increased. These findings show that the multilayer ultrathin γ-Fe2O3film possesses good magnetic properties that are close to those of the bulk of γ-Fe2O3, and will thus be useful in developing spintronic devices with good performance and other technological applications.

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Acknowledgements

We would like to acknowledge the technical support received from the Center of Nanotechnology at KAU.

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  1. Department of Physics, Umm Al-Qura University, Makkah, 24382, Kingdom of Saudi Arabia

    Shoroog Alraddadi

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  1. Shoroog Alraddadi
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Alraddadi, S. Electronic structure and magnetic properties of (γ-Fe2O3/MgO)N multilayers. Appl. Phys. A 127, 53 (2021). https://doi.org/10.1007/s00339-020-04204-y

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