Fabrication of spin-filter magnetic-hetero structures and their applications to electronic devices

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To fabricate spin-filter magnetic-hetero structures, it is essential to fabricate a buffer layer on a Si substrate. In the whole years, I tried to fabricate such a buffer, mainly gamma-Al2O3, on Si substrates. Direct deposition of Al2O3 on Si was performed using a electron-beam evaporator and a pulsed laser deposition system. In addition, thermal reaction of Al and SiO2 was also performed after an Al film deposition on a SiO2/Si substrate.Fabricated buffer layers were evaluated using reflective high energy electron diffraction, atomic force microscope, and X-ray photoelectron spectroscopy. From the analysis, it was concluded that Al2O3 layers without SiO2 interlayers were successfully fabricated on Si substrates , but I could not try to fabricate magnetic multi layers on these buffer layers.