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Middelhoek1 proposed in 1961 that the domain structure of narrow thin film strips could be used to measure energies of domain walls and Kuwahara et al. have likewise suggested this method.2 When measurements were attempted by these authors it was found that experimental results of wall energy were about a factor of four lower than calculated values. Furthermore, and contrary to theoretical calculations, there was no variation of wall energy density with film thicknes.2 This note proposes improvements in the experimental procedure, and reportss ome results which resolve the inconsistencies in the literature.
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