Title :
Temperature dependence of the anisotropy constants in Nd2Fe14B-based hard materials containing Dy
Author :
Cebollada, F. ; Martin, V.E. ; de Julian, C. ; Gonzalez, J.M.
Author_Institution :
Inst. de Ciencia de Mater., CSIC, Madrid, Spain
fDate :
3/1/1994 12:00:00 AM
Abstract :
We have evaluated, at different temperatures, the second and fourth order anisotropy constants of Nd2Fe14B-based melt spun samples in which Nd was partly replaced by Dy. This was done through an analysis of the first quadrant demagnetization branches of the hysteresis loops in terms of a one sublattice coherent rotation model of non interacting isotropically distributed grains. Our results evidence how the increase in Dy content corresponds both to the increase of the second order anisotropy constant and to a decrease of the fourth order one
Keywords :
boron alloys; demagnetisation; dysprosium alloys; iron alloys; magnetic anisotropy; magnetic hysteresis; neodymium alloys; (NdDy)2Fe14B; Dy content; anisotropy constants; demagnetization branches; hard magnetic materials; hysteresis loops; melt spun samples; noninteracting isotropically distributed grains; one sublattice coherent rotation model; temperature dependence; Anisotropic magnetoresistance; Crystallization; Grain size; Iron; Magnetic anisotropy; Magnetic materials; Neodymium; Perpendicular magnetic anisotropy; Temperature dependence; X-rays;
Journal_Title :
Magnetics, IEEE Transactions on
