A New Theoretical Model for Calculation of Magneto-crystalline Anisotropy in R 2 Fe 14 B Series Compounds

1 Introduction The R_2Fe_(14)B type compound (R=rare earths)is an important kind of magnetic materials. One of its important features is that it has very strong magneto-crystalline anisotropy,which exhibits very complex characteristics with different rare earth elements. The calculations of the magneto-crystalline anisotropy for compounds Nd_2Fe_(14)B and Pr_2Fe_(14)B have been made by many researchers using point charge model, but their results can