A mean-field model for rare-earth-transition-metal RE-TM alloys developed to analyze ternary (TbFeCo) and quaternary (TbGdFeCo, TbDyFeCo) alloys of interest in thermomagnetic recording is described. The model is based on the localized mean-field theory and emphasizes the reduction of adjustable parameters. The experimental magnetization versus temperature curves are compared to the model predictions, and good agreement is obtained in all cases. The exchange parameters and atomic moment values obtained are consistent with the current understanding of these alloys. The possibility of including an intinerant model to account for the 3d transition-metal magnetic electrons is considered.
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Physics and Astronomy (miscellaneous)
Research output: Contribution to journal › Article