Title :
Modelling of the combined effects of stress and anisotropy on the magnetostriction of Tb0.3Dy0.7Fe2
Author :
Jiles, D.C. ; Thoelke, J.B.
Author_Institution :
Ames Lab., Iowa State Univ., IA, USA
fDate :
11/1/1991 12:00:00 AM
Abstract :
It is shown how the magnetization and magnetostriction of Tb0.3Dy0.7Fe2 can be calculated using a three-dimensional anisotropy model with fractional occupancies p1,. . .p8 along each of the easy <111> axes. This model assumes no interaction between the domains. Three-dimensional plots of the sum of anisotropy and field energy are presented which show the locations of energy minima and their evolution as the field strength along the [112] axis is increased. From the model it is shown how the magnetization and magnetostriction vary as a function of field for single domains oriented initially along each of the easy <111> axes. The critical field strengths were found for each of the domain orientations and are comparable with experimental observations
Keywords :
dysprosium alloys; iron alloys; magnetic anisotropy; magnetic domains; magnetisation; magnetostriction; terbium alloys; Tb0.3Dy0.7Fe2; anisotropy; domain orientations; energy minima; field energy; field strength; fractional occupancies; magnetization; magnetostriction; single domains; stress; three-dimensional anisotropy model; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic domains; Magnetic fields; Magnetic materials; Magnetization; Magnetostriction; Perpendicular magnetic anisotropy; Stress; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
