Magnetic resonance in [(CoP)$_{\text{soft}}$/NiP/(CoP)$_{\text{hard}}$/NiP]$_{n}$ multilayer magnetic springs

The magnetic resonance properties of [(CoP)$_{\text{soft}}$/NiP/(CoP)$_{\text{hard}}$/NiP]$_{n}$ multilayer films with the properties of magnetic springs have been experimentally studied. It has been found that the deposition of a NiP nonmagnetic amorphous layer on a (CoP)$_{\text{soft}}$ magnetic layer induces the appearance of perpendicular interface anisotropy. The increase in the number of blocks n in the multilayer structure leads to the appearance of the third absorption peak, which is explained by the formation of a noncollinear three-sublattice magnetic structure.