Magnetization process and magnetic properties of Co/Cr/Co trilayers

Magnetic domain studies, Brillouin scattering experiments and microwave spectroscopy were performed on Co/Cr/Co trilayers. For d(Cr) < 10 Angstrom, strong ferromagnetic coupling is found, while above 10 Angstrom of Cr the interlayer coupling is negligible. In ultra high vacuum deposited samples with d(Cr) about 15 Angstrom, an antiferromagnetic coupling was found (K-c approximate to -0.1 erg/cm(2)), accompanied by a transition to a patch domain pattern.