1. J. A. Osborne, Demagnetizing Factors of the General Ellipsoid, Phys. Rev. 67:351 (1945).
2. Michael Tinkham, “Introduction to Superconductivity”, McGraw-Hill, New York, (1975), p. 91.
3. D. Shoenberg, “Superconductivity”, Cambridge University Press, London, (1952), p. 23.
4. This expression can be obtained by integrating M=B-H across the film thickness. An expression for B(x) is given, for example, in Tinkham’s book (ref. 2), Eq. 4-54a.
5. Ch. Neuman, P. Ziemann, J. Geerk, and H. C. Li, Characterization of YBaCuO Films by ac-Susceptibility Measurements, Journal of the Less-Common Metals 151:363 (1989).