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Microstructure and magnetic properties of fcc-FePt/L10-FePt exchange-coupled composite films

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Abstract

The fcc-FePt/L10-FePt exchange-coupled composite films were prepared on (100)-oriented single-crystal MgO substrates using dc magnetron sputtering. The effects of fcc-FePt layer thickness and annealing temperature on microstructure and magnetic properties of fcc-FePt/L10-FePt films have been investigated. The fcc-FePt/L10-FePt film with high (001) orientation, low coercivity field, and strong soft/hard magnetic exchange-coupled interaction is obtained with 4 nm fcc-FePt layer. After annealing, there are interdiffusion and coalescence between fcc-FePt and L10-FePt layers. With increasing annealing temperature, (001) orientation and perpendicular magnetic anisotropy of the annealed films decrease, and coercivities increase. The annealed films have a relatively small value of switching field distribution.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 21371071 and 11504132).

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Authors and Affiliations

  1. Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping, 136000, China

    Yumei Zhang, Shanshan Li, Mei Liu, Ming Feng & Haibo Li

  2. Key Laboratory of Automobile Materials Ministry of Education, Jilin University, Changchun, 130025, China

    Liang Zhao

  3. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, 130012, China

    Haibo Li

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  1. Yumei Zhang
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  2. Liang Zhao
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  3. Shanshan Li
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  4. Mei Liu
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  5. Ming Feng
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Correspondence to Haibo Li.

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Zhang, Y., Zhao, L., Li, S. et al. Microstructure and magnetic properties of fcc-FePt/L10-FePt exchange-coupled composite films. Appl. Phys. A 124, 159 (2018). https://doi.org/10.1007/s00339-018-1587-4

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  • DOI: https://doi.org/10.1007/s00339-018-1587-4

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