1. For example, see F.E. Luborsky, in Ferromagnetic Materials, ed. E.P. Wohlfarth, Vol. 1 (North Holland, Amsterdam, 1980) Ch 6, p. 451. T. Egami, Rep. Prog. Phys. 47 (1984) 1601 and the references therein.
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3. W.A. Grant, Nucl. Inst. Methods. 182/183 (1981) 809.
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5. C. Radhakrishnamurthy, S.D. Likhite and P.W. Sahasrabudhe, Proc. Ind. Acad. Sci. 87A (1978) 245.