A. B. Rinkevich, E. A. Kuznetsov, D. V. Perov, M. A. Milyaev, L. I. Naumova, M. V. Ryabukhina, “CoFe/Cu/CoFe/FeMn spin valves and CoFe/Cu/CoFe three-layer nanostructures at microwave frequencies”, Zhurnal Tekhnicheskoi Fiziki, 2022, Volume 92, Issue 11,Pages <nobr>1711

Physics of nanostructures

CoFe/Cu/CoFe/FeMn spin valves and CoFe/Cu/CoFe three-layer nanostructures at microwave frequencies

A. B. Rinkevich^a, E. A. Kuznetsov^ab, D. V. Perov^a, M. A. Milyaev^a, L. I. Naumova^a, M. V. Ryabukhina^a

^a Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
^b Russian State Professional Pedagogical University, 620012 Ekaterinburg, Russia

Abstract: The microwave magnetoresistance of CoFe/Cu/CoFe/FeMn spin valves and CoFe/Cu/CoFe three-layer nanostruc- tures with high magnetoresistance has been studied. The transmission and reflection coefficients were measured at the frequency range from 26 to 38 GHz in magnetic fields up to 12 kOe. It is shown that the dependences of the transmission coefficient of spin valves are not symmetric with respect to the H = 0 axis, as well as the dependences of magnetoresistance. It is established that the relative changes in the microwave transmission coefficient are 1.5–2 times higher than the relative magnetoresistance measured at direct current. Changes in the reflection coefficient have a smaller value and the opposite sign with respect to changes in the transmission coefficient.

Keywords: metal superlattices, spin valves, ferromagnetic resonance, ferromagnetic antiresonance, microwave giant magnetoresistance effect.

Received: 24.06.2022
Revised: 10.07.2022
Accepted: 21.07.2022

DOI: 10.21883/JTF.2022.11.53445.168-22