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FePt-C granular thin film for heat-assisted magnetic recording (HAMR) media

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Abstract

We studied a FePt-C granular film for ultra-high density perpendicular recording media towards 1 Tbits/in.2 because of strong magnetocrystalline anisotropy at its L10-phase. We deposit a Fe52Pt48-C50 % (6.7 nm) film on oxidized silicon substrates at 400 °C and 0.50 Pa Ar pressure. The perpendicular anisotropy of the film is 20 kOe, with a perfect squareness of 1. Bright-field transmission electron microscopy (TEM) images display that the FePt granular film has small and uniform grains of 6.4 ± 1.5 nm. Further work on high-resolution TEM imaging demonstrates excellent L10 ordering for this FePt granular film, which is consistent with the texture measurement by X-ray diffraction. Thus, we prove that FePt granular film is a promising candidate for high-density heat-assisted magnetic recording media.

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Acknowledgments

This work was supported in part by the National Natural Science Foundation of China (Grant No. 51001078, and 51202155), and the Natural Science Foundation of Zhejiang Province, China (Grant No. Y4110547, and Y4110207).

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Authors and Affiliations

  1. Department of Physics and Electronic Engineering, Taizhou University, Taizhou, 318000, People’s Republic of China

    L. Zhang, S.-X. Xue, Z.-G. Li, Y.-P. Liu & W.-P. Chen

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  1. L. Zhang
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  2. S.-X. Xue
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  3. Z.-G. Li
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  4. Y.-P. Liu
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  5. W.-P. Chen
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Correspondence to L. Zhang or Z.-G. Li.

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Zhang, L., Xue, SX., Li, ZG. et al. FePt-C granular thin film for heat-assisted magnetic recording (HAMR) media. Appl. Phys. A 116, 1257–1260 (2014). https://doi.org/10.1007/s00339-013-8216-z

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  • DOI: https://doi.org/10.1007/s00339-013-8216-z

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