Effects of layer modulus on the phase evolutions and magnetic properties of [MgO/FePt]n multilayer thin films
Source abstract
Abstract
International audience ; Multilayer structural system is expected to reduce demagnetization energy and obtain outstanding magnetic anisotropy. The effects of layer modulus (n) on the phase evolutions and magnetic properties of [MgO/FePt]n multilayer thin films were systematically investigated. The low ordering parameters and coercivity when annealing at 600 °C indicated that the existence of the MgO phase would enhance the L10–FePt transformation temperature. When annealing at 800 °C, the coercivity of 9 kOe with a superior in-plane magnetic anisotropy was obtained in [MgO/FePt]2 multilayer film. This multilayer film has reasonable exchange coupling interactions between the magnetic grains (α = 2.4) that could be utilized as an ideal candidate for micro-electro-mechanical systems (MEMS).
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic properties of thin films · Magnetic Properties and Applications · Magnetic Properties of Alloys
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References (21)
Show source-provided references
1. B.Z. Cui, K. Han, D.S. Li et al., Magnetic-field-induced crystallographic texture enhancement in cold-deformed FePt nanostructured magnets. J. Appl. Phys. 100, 013902 (2006). https://doi.org/10.1063/1.220641010.1063/1.2206410 ↗
2. H. Fukunaga, T. Kamikawatoko, M. Nakano et al., Effect of laser beam parameters on magnetic properties of Nd–Fe–B thick-film magnets fabricated by pulsed laser deposition. J. Appl. Phys. 109, 07A758 (2011). https://doi.org/10.1063/1.356608010.1063/1.3566080 ↗
3. T. Yanai, K. Furutani, T. Ohgai et al., F–Pt thick-film magnets prepared by electroplating method. J. Appl. Phys. 117, 17A744 (2015). https://doi.org/10.1063/1.491869810.1063/1.4918698 ↗
4. J.H. Bae, T.K. Kim, H.M. Kim et al., Effect of Pt and FePt layer thickness on microstructure and magnetic properties of L10 FePt films with perpendicular anisotropy. IEEE Trans. Magn. 55, 1–6 (2019). https://doi.org/10.1109/TMAG.2019.290813410.1109/TMAG.2019.2908134 ↗
5. C.P. Luo, D.J. Sellmyer, Structural and magnetic properties of FePt:SiO2 granular thin films. Appl. Phys. Lett. 75, 3162 (1999). https://doi.org/10.1063/1.12526410.1063/1.125264 ↗
6. T. Shima, K. Takanashi, Y.K. Takahashi et al., Coercivity exceeding 100 kOe in epitaxially grown FePt sputtered films. Appl. Phys. Lett. 85, 2571 (2004). https://doi.org/10.1063/1.179486310.1063/1.1794863 ↗
7. P.V. Makushko, M.Y. Verbytska, M.N. Shamis et al., Effect of initial stress/strain state on the L10 phase formation of FePt in FePt/Au/FePt trilayers. Appl. Nanosci. 10, 2775–2780 (2020). https://doi.org/10.1007/s13204-019-01066-610.1007/s13204-019-01066-6 ↗
8. M. Futamoto, M. Nakamura, T. Shimizu et al., Influence of stress and strain on L10 -ordered phase formation in FePt thin film. IEEE Trans. Magn. 54(11), 2102204 (2018). https://doi.org/10.1109/TMAG.2018.282983110.1109/TMAG.2018.2829831 ↗
9. J. Tsai, C. Sun, J. Lin et al., Magnetic properties and microstructure of FePt (Ag, C) films with MgTiOBN/CrRu underlayer. Surf. Coat. Tech. 434, 128136 (2022). https://doi.org/10.1016/j.surfcoat.2022.12813610.1016/j.surfcoat.2022.128136 ↗
10. Y.K. Takahashi, K. Hono, T. Shima et al., Microstructure and magnetic properties of FePt thin films epitaxially grown on MgO (001) substrates. J. Magn. Magn. Mater 267, 248–255 (2003). https://doi.org/10.1016/S0304-8853(03)00377-910.1016/S0304-8853(03)00377-9 ↗
11. W. Lu, C.C. He, Z. Chen et al., Magnetic properties of epitaxial-grown exchange-coupled FePt/FeRh bilayer films. Appl. phys. A. 108, 149–153 (2012). https://doi.org/10.1007/s00339-012-6862-110.1007/s00339-012-6862-1 ↗
12. M. Hagiuda, S. Mitani, T. Seki et al., Epitaxial growth of L10–FePt/MgO/L10–FePt (0 0 1) trilayer structures. J. Magn. Magn. Mater. 310, 1905–1907 (2007). https://doi.org/10.1016/j.jmmm.2006.10.87710.1016/j.jmmm.2006.10.877 ↗
13. Y.F. Ding, J.S. Chen, E. Liu, Epitaxial L10 FePt films on SrTiO3 (100) by sputtering. J. Crystal. Growth. 276, 111–115 (2005). https://doi.org/10.1016/j.jcrysgro.2004.10.15410.1016/j.jcrysgro.2004.10.154 ↗
14. B. Laenens, F.M. Almeida et al., Interplay between structural and magnetic properties of L10–FePt(001) thin films directly grown on MgO (001). J. Appl. Phys. 105, 073913-073913–073916 (2009). https://doi.org/10.1063/1.309395510.1063/1.3093955 ↗
15. T. Suzuki, Z. Zhang, A.K. Singh et al., Annealing effect on magnetic property and recording performance of [FePt/MgO]n perpendicular magnetic recording media. J. Magn. Magn Mater. 286, 306–310 (2005). https://doi.org/10.1016/j.jmmm.2004.09.08410.1016/j.jmmm.2004.09.084 ↗
16. I. Suzuki, J. Wang, Y.K. Takahashi et al., Control of grain density in FePt–C granular thin films during initial growth. J. Magn. Magn. Mater. 500, 166418 (2020). https://doi.org/10.1016/j.jmmm.2020.16641810.1016/j.jmmm.2020.166418 ↗
17. C. Feng, B.H. Li, Y. Liu et al., Improvement of magnetic property of L10–FePt film by FePt∕Au multilayer structure. J. Appl. Phys. 103, 023916 (2008). https://doi.org/10.1063/1.282814810.1063/1.2828148 ↗
18. F.J. Yang, H. Wang, H.B. Wang et al., Effect of interfacial diffusion on microstructure and properties of FePt/B4C multifunctional multilayer composite films. Appl. Surf. Sci. 254, 2516–2520 (2008). https://doi.org/10.1016/j.apsusc.2007.09.08510.1016/j.apsusc.2007.09.085 ↗
19. T.J. Zhou, M.H. Lu, L. Shen et al., Synthesis, characterization and hard ferromagnetism in FePt/ZnO nanocomposites with ultra-small size. IEEE Trans. Magn. 50(1), 1–5 (2014). https://doi.org/10.1109/TMAG.2013.227279410.1109/TMAG.2013.2272794 ↗
20. M. Ohtake, A. Itabashi, M. Futamoto et al., Crystal orientation, order degree, and surface roughness of FePd-alloy film formed on MgO (001) substrate. IEEE Trans. Magn. 51, 2100904 (2015). https://doi.org/10.1109/TMAG.2015.243488310.1109/TMAG.2015.2434883 ↗
21. J. Chiou, H.W. Chang, C. Chi, C. Hsiao, C. Ouyang, L10 FePt films with optimal (001) texture on amorphous sio2/si substrates for high-density perpendicular magnetic recording media. ACS Appl. Nano. Mater. 2, 5663–5673 (2019). https://doi.org/10.1021/acsanm.9b0119210.1021/acsanm.9b01192 ↗