Features of the Behavior of an Fe1/Cu/Fe2/Cu/Pb Superconducting Spin Valve on a Piezoelectric Substrate

Properties of an Fe1/Cu/Fe2/Cu/Pb superconducting spin valve formed on a [Pb(Mg_1/3Nb_2/3)O₃]_0.7‒[PbTiO₃]_0.3 (PMN‒PT) piezoelectric substrate are studied in external magnetic and electric fields. The temperature of the superconducting transition shifts by more than 200 mK upon changing the mutual orientation of the ferromagnetic layer magnetizations from antiparallel to perpendicular in magnetic field H₀ = 1 kOe. Anomalous behavior of the dependence of the temperature of the superconducting transition on the angle between the magnetizations of the ferromagnetic layers is observed in the maximum temperatures of the superconducting transition at an orthogonal orientation of the magnetizations of the ferromagnetic layers. The possibility of obtaining a full superconducting spin valve effect is demonstrated. It is established that the shift of the temperature of the superconducting transition grows along with an electric field applied to the PMN‒PT piezoelectric substrate. A maximum shift of 10 mK is detected in an electric field of 1 kV/cm.