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MAGNETOELECTRONICS, SPIN ELECTRONICS, AND SPINTRONICS are different names for the use of electrons' spins (not just their electrical charge) in information circuits. Spin polarization, the difference in the number of spin-up and spin-down electrons, is an intrinsic property of ferromagnetic materials. Materials with high spin polarization have important technological implications for magneto-electronic devices, e.g. devices that use magnetic tunnel junctions (MTJ), giant magneto-resistance (GMR) and/or magnetic random access memory, (MRAM). The fundamental physics of high spin polarization materials forms the basis for future technological applications. Measurements of spin polarization have been performed on caxis gadolinium and dysprosium thin films, epitaxially grown on (11-20) sapphire substrates with a tungsten (110) seed layer. The values of spin polarization of caxis epitaxial gadolinium and dysprosium films were obtained using the point contact Andreev reflection (PCAR) technique with quantitative analyses.
Spintronics is changing the semiconductor development in the near future.