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Enhancement of in-plane magnetic anisotropy in (111)-oriented Co0.8Fe2.2O4 thin film by deposition of PZT top layer

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Abstract

The CoFe2O4 and Co0.8Fe2.2O4 single layer (CFO) as well as PZT/CoFe2O4 and PZT/Co0.8Fe2.2O4 bilayer thin films were grown using the pulsed laser deposition technique on Pt(111)/Si substrates at 600 °C. All films had a perfect (111)-orientation and the degree of orientation of CFO films was improved by the deposition of a PZT top layer. Precision X-ray diffraction analysis (avoiding the shift of peaks due to sample misalignment) revealed that the CFO films on Pt(111)/Si substrate were under an out-of-plane contraction and the deposition of a PZT top layer led to the increase in the out-of-plane contraction. The (111)-oriented CFO single layer films had a strong in-plane magnetic anisotropy as a result of orientation as well as the stress-induced magnetic anisotropy. The magnetic properties of CFO film were altered by the deposition of a PZT top layer leading to the enhancement of in-plane magnetic anisotropy. The enhanced in-plane magnetic anisotropy was more detectable in PZT/Co0.8Fe2.2O4 rather than PZT/CoFe2O4 bilayer film, which could be expected from its higher magnetocrystalline as well as magnetostriction constants.

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Acknowledgments

M. K. is grateful for the financial support of the Department of Materials Science & Engineering, and the Ferroelectric Nano Materials Lab. at POSTECH.

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Authors and Affiliations

  1. Center of Excellence for Magnetic Materials, School of Metallurgy and Materials, Faculty of Engineering, University of Tehran, Tehran, Iran

    M. Khodaei & S. A. Seyyed Ebrahimi

  2. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Korea

    M. Khodaei, Junwoo Son & Sunggi Baik

  3. Pohang Accelerator Laboratory, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Korea

    Yong Jun Park

  4. Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Korea

    Jong Mok Ok & Jun Sung Kim

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  1. M. Khodaei
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  2. S. A. Seyyed Ebrahimi
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  4. Jong Mok Ok
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Correspondence to M. Khodaei.

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Khodaei, M., Seyyed Ebrahimi, S.A., Park, Y.J. et al. Enhancement of in-plane magnetic anisotropy in (111)-oriented Co0.8Fe2.2O4 thin film by deposition of PZT top layer. Appl. Phys. A 117, 1153–1160 (2014). https://doi.org/10.1007/s00339-014-8486-0

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  • DOI: https://doi.org/10.1007/s00339-014-8486-0

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