METHOD FOR PRODUCING A GIANT MICROWAVE MAGNETORESISTIVE EFFECT IN A (CoFe)/Cu SUPERLATTICE Russian patent published in 2022 - IPC G11B5/39 

FIELD: magnetoresistive effect.

SUBSTANCE: invention is intended to obtain a microwave giant magnetoresistive effect in reflection from a (CoFe)/Cu type superlattice. The substance of the invention lies in the fact that a superlattice sample is grown on a Corning glass substrate by magnetron sputtering so that the thickness of the copper layer provides antiparallel ordering of spins in adjacent CoFe layers, the sample is placed in the cross section of a rectangular waveguide, completely overlapping this section, while the magnetic the field is applied in the plane of the superlattice perpendicular to the direction of wave propagation, the incidence of electromagnetic waves in the frequency range from 26 to 38 GHz on the sample, the measurement of the microwave reflection coefficient R and its dependence on the magnetic field using a panoramic meter of amplitude-frequency characteristics at room temperature, the calculation of the relative changes in the reflection coefficient in a magnetic field according to a given mathematical formula, while using a substrate whose thickness is a multiple of the thickness of a quarter-wave plate, and the electromagnetic wave first falls on the dielectric substrate y, then to the superlattice according to the scheme - generator-substrate-metal of the superlattice.

EFFECT: increase the effect of the microwave giant magnetoresistive effect.

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