1. Jacobs, I. S.; Bean, C. P. InMagnetism; Rado, G. T., Suhl, H., Eds.; Academic Press: New York, 1963; Vol. 3, pp 271−350, and references therein.
2. Brown, W. F., Jr.Micromagnetics; Wiley-Interscience, New York, 1963.
3. Effect of oxide layer on the hysteresis behavior of fine Fe particles