High-frequency magnetoresonance and magnetoimpedance in Co/Cu multilayers with variable interlayer thickness

Abstract

The paper is devoted to the investigation of high frequency magnetic features of multilayered metallic structures (Co/Cu) demonstrating the Giant Magnetic Resistance effect (GMR-effect) and Giant Magnetic Impedance effect (GMI-effect). Dynamic features have been investigated in dependence on the distance between magnetic Co-layers and analyzed in comparison with static magnetic features. Ferromagnetic resonance response as well as non-resonance magnetoimpedance. at small applied static magnetic field have been studied. Experiments were carried out at room temperatures in frequency band 20-37GHz for the ferromagnetic resonance technique and in frequency band 30-140GHz for study the low field non-resonance magnetoimpedance effects.