Fig. 18

Schematic diagram of the thickness of each layer of a multilayer structure, a shows the thickness of Al₂O₃/MgO (on the silicon wafer, grow 2 nm-Al₂O₃, and then grow 15 nm-MgO), b shows the thickness of MgO (on the silicon wafer, grow 20 nm-MgO), c shows the thickness of Al₂O₃/MgO (on the silicon wafer, grow 2 nm-Al₂O₃, and then grow 9 nm-MgO), d shows the thickness of MgO (on the silicon wafer, grow 9 nm-MgO)