Title :
FeGdN: a new soft magnetic metallic thin film material
Author_Institution :
Philips Res. Lab., Eindhoven, Netherlands
fDate :
11/1/1994 12:00:00 AM
Abstract :
Thin films of Fe100-x-yGdxNy were sputter deposited in an Ar-N2 atmosphere in a Balzers triode system. The composition ranges were 4.8<x<11 and 11<y<25. These films were annealed between 400 and 600°C in a magnetic field to obtain a nano-crystalline structure and to induce a uniaxial anisotropy. After annealing high values for the high-frequency (at 1 MHz) initial relative permeability were obtained: up to μ=4000. The coercive field of these films was low (around 20 A/m). Fe and GdN phases were identified with X-ray diffraction. The sizes of the Fe and FeGd crystallites are around 10 nm. Both Fe and GdN are ferromagnetic, the latter with a Curie temperature of 69 K. Measurement of the saturation magnetization as a function of temperature showed that below 60 K the GdN crystallites are coupled anti-ferromagnetically with the Fe crystallites
Keywords :
Curie temperature; X-ray diffraction; annealing; antiferromagnetic materials; coercive force; ferromagnetic materials; ferromagnetic-antiferromagnetic transitions; gadolinium compounds; induced anisotropy (magnetic); iron compounds; magnetic anisotropy; magnetic permeability; magnetic thin films; nanostructured materials; soft magnetic materials; 400 to 600 C; Balzers triode system; FeGdN; X-ray diffraction; annealing; antiferromagnetic coupling; coercive field; crystallites; ferromagnetic; induced uniaxial anisotropy; nanocrystalline structure; permeability; saturation magnetization; soft magnetic metallic thin film; sputter deposited coatings; Annealing; Crystallization; Inorganic materials; Iron; Magnetic films; Magnetic materials; Saturation magnetization; Soft magnetic materials; Sputtering; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
