| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Research Abstract |
In this study, tunneling-spin filtering effect of ferromagnetic insulator CoFe_2O_4 with perpendicular magnetic anisotropy was studied. To improvement surface flatness of CoFe_2O_4 films, the films were grown on MgO(001) substrates by pulse laser deposition method with a shadow mask. The CoFe_2O_4 films without droplet formation with perpendicular anisotropy energy density of 2.36x106 erg/cm3 were obtained. Magnetoresistance measurements were carried out for magnetic tunnel junctions (MTJs) using MgO/CoFe_2O_4 and ferromagnetic metal L10-type FePd electrodes fabricated on MgO (001) substrates. The tunnel magnetoresistance ratio of 0.7% at 5 K and 16.5% at 300 K was obtained for the MTJs.
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