1. Cullity B. D., “Introduction to Magnetic Materials,” Addison-Wesley, Chapter 8, (1972).
2. McClure J. C. and Schroeder K., CRC Crit. Rev. Sol. St. Sci 6, 45, (1976).
3. Titto S., Acta Polytech. Scand 119, 1, (1977).
4. Matzkanin G. A., Beissner R. E., and Teller C. M., S.W.R.I. Report No. NTIAC-79-2, (1979).
5. Ono K. and Shibata M., Mater. Eval. 55, (1980).