Engineered Heusler Ferrimagnets with a Large Perpendicular Magnetic Anisotropy
AbstractSynthetic perpendicular magnetic anisotropy (PMA) ferrimagnets consisting of 30-nm-thick D022-MnGa and Co2MnSi (CMS) cubic Heusler alloys with different thicknesses of 1, 3, 5, 10 and 20 nm, buffered and capped with a Cr film, are successfully grown epitaxially on MgO substrate. Two series samples with and without post annealing at 400 °C are fabricated. The (002) peak of the cubic L21 structure of CMS films on the MnGa layer is observed, even for the 3-nm-thick CMS film for both un-annealed and annealed samples. The smaller remnant magnetization and larger switching field values of CMS (1–20 nm)/MnGa (30 nm) bilayers compared with 30-nm-thick MnGa indicates antiferromagnetic (AFM) interfacial exchange coupling (Jex) between MnGa and CMS films for both un-annealed and annealed samples. The critical thickness of the CMS film for observing PMA with AFM coupling in the CMS/MnGa bilayer is less than 10 nm, which is relatively large compared to previous studies. View Full-Text
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Ranjbar, R.; Suzuki, K.; Sugihara, A.; Miyazaki, T.; Ando, Y.; Mizukami, S. Engineered Heusler Ferrimagnets with a Large Perpendicular Magnetic Anisotropy. Materials 2015, 8, 6531-6542.
Ranjbar R, Suzuki K, Sugihara A, Miyazaki T, Ando Y, Mizukami S. Engineered Heusler Ferrimagnets with a Large Perpendicular Magnetic Anisotropy. Materials. 2015; 8(9):6531-6542.Chicago/Turabian Style
Ranjbar, Reza; Suzuki, Kazuya; Sugihara, Atsushi; Miyazaki, Terunobu; Ando, Yasuo; Mizukami, Shigemi. 2015. "Engineered Heusler Ferrimagnets with a Large Perpendicular Magnetic Anisotropy." Materials 8, no. 9: 6531-6542.