Abstract
Magnetic interactions of [Co/Cr]n/IrMn and [Fe/Pt]n/IrMn multilayers grown by magnetron sputtering were investigated by ferromagnetic resonance (FMR) and magnetometry. The phenomenological model used to determine the magnetic anisotropies parameters from the FMR data also revealed the presence of a rotatable anisotropy in the samples studied. The rotatable anisotropy field in [Co/Cr]n/IrMn multilayers can be associated to antiferromagnetic coupling between the Co and Cr layers, while in the case of [Fe/Pt]n/IrMn multilayers, the polarization of Pt atoms may account for the negative rotatable anisotropy.
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