A method including forming a device stack including a dielectric layer between a fixed magnetic layer and a free magnetic layer on a fully-crystalline sacrificial film or substrate including a crystal lattice similar to the crystal lattice of the dielectric material; and transferring the device stack from the sacrificial film to a device substrate. An apparatus including a device stack including a dielectric layer between a fixed magnetic layer and a free magnetic layer on a device substrate wherein the fixed magnetic layer and the free magnetic layer each have a crystalline lattice conforming to a crystalline lattice of the sacrificial film or substrate on which they were formed prior to transfer to the device substrate.