Microsoft Corporation
Josephson magnetic memory with a semiconductor-based magnetic spin valve

Abstract:

Josephson magnetic memory cells with a semiconductor-based magnetic spin valve are described. An example memory cell includes a first superconducting electrode, a second superconducting electrode, and a semiconductor-based magnetic spin valve arranged between the two superconducting electrodes. The semiconductor-based magnetic spin valve includes a semiconductor layer and a first ferromagnetic insulator arranged near the semiconductor layer, arranged on a first side of the semiconductor layer, configured to provide a fixed magnetization oriented in a first direction. The semiconductor-based magnetic spin valve further includes a second ferromagnetic insulator, arranged on a second side, opposite to the first side, of the semiconductor layer, configured to provide a free magnetization oriented in the first direction or a second direction, opposite to the first direction, in order to control a parameter associated with a flow of current from the first superconducting electrode to the second superconducting electrode through the semiconductor layer.