Abstract
Magnetization process was studied in Co/Cr/Co trilayers. B-H hysteresis loops, domain patterns and different types of domain walls were correlated with the interlayer exchange coupling strength. For dCr < 10 A, a cross-tie character of walls indicates a strong ferromagnetic coupling between the cobalt sublayers, which is decreasing rapidly above 10 A of Cr. In ultra high vacuum deposited samples with dCr about 15 A, both stepped hysteresis loops and a patch domain pattern indicate an antiferromagnetic coupling.
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