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Magnetically soft and high‐saturation‐magnetization FeCo films fabricated by co‐sputtering
Author(s) -
Fu Yu,
Cheng Xiaofeng,
Yang Zheng
Publication year - 2005
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200420014
Subject(s) - coercivity , materials science , sputtering , saturation (graph theory) , magnetization , magnetic anisotropy , analytical chemistry (journal) , texture (cosmology) , thin film , layer (electronics) , anisotropy , condensed matter physics , nuclear magnetic resonance , composite material , magnetic field , nanotechnology , chemistry , optics , physics , mathematics , combinatorics , quantum mechanics , chromatography , artificial intelligence , computer science , image (mathematics)
Magnetically soft FeCo films with high saturation magnetization were successfully obtained by co‐sputtering Fe 65 Co 35 films onto a very thin Co 93 Fe 7 seed layer. The coercivity of single FeCo films on the substrate was markedly reduced by increasing the deposition temperature and appropriately selecting the composition. The effect of composition and thickness of a high‐Co‐concentration Co 100– y Fe y (0 ≤ y ≤ 11) seed layer on the magnetic properties and structure of Co 100– y Fe y (0–10 nm)/Fe 65 Co 35 (100 nm) films was studied. It was observed that the texture of Fe 65 Co 35 films changed from (110) to (200) on using a Co 100– y Fe y seed layer. The appearance of (200) texture and film growth with less lattice strain improved the soft magnetic properties of FeCo films. A double‐layer Co 93 Fe 7 (1 nm)/Fe 65 Co 35 (100 nm) film was obtained with saturation magnetization μ 0 M s = 2.4 T, easy‐axis coercivity H ce = 1 kA/m, hard‐axis coercivity H ch = 0.2 kA/m and anisotropy field H K = 6.4 kA/m. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)