Title :
Crystal Structure and Magnetic Properties of Mn-Al-Ni Ferromagnetic Films
Author :
Matsumoto, M. ; Morisako, A. ; Kohshiro, N.
Author_Institution :
Shinshu University.
Abstract :
Mn60-xAl40Nix ternary films were prepared by dc magnetron sputtering and their crystallographic characteristics and magnetic properties were investigated. The ¿ phase was synthesized at Ni contents below 7 at%. The lattice constant a increased from 3.98 Ã
to 4.12 Ã
, and c decreased from 3.48 Ã
to 3.21 Ã
, as a result of increasing the Ni substitution. The Ms of the ¿-phase films increased with increasing Ni substitution up to an Ni content of a few percent. The maximum values for Ms and Hc, 240 emu/cc and 2.9 kOe respectively, were obtained at an Ni content of 3 at%. The high Hc was due to the increased asymmetry of the tetragonal structure. The magnetic anisotropy of ¿-phase films was caused mainly by the preferential orientation of the c-axis of the tetragonal crystallites.
Keywords :
Iron alloys; Lattices; Magnetic anisotropy; Magnetic films; Magnetic properties; Magnetics Society; Metastasis; Perpendicular magnetic anisotropy; Sputtering; Transistors;
Journal_Title :
Magnetics in Japan, IEEE Translation Journal on
DOI :
10.1109/TJMJ.1991.4565123