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기판과 부도체층을 개선한 FM / Al₂O₃ / FM (FM=Ferromagnet) 자기터널링 접합제작 및 자기수송에 관한 연구
변상진(S. J. Byeun),박병기(P. K. Park),장인우(I. W. Jang),염민수(M. S. Youm),이재형(J. H. Lee),이긍원(K. W. Rhie) 한국자기학회 1999 韓國磁氣學會誌 Vol.9 No.5
The effect of substrate and oxidization time on substrate/Py/Al₂O₃/Co (Py=Ni_(81)Fe_(19) tunnel junction was studied. Samples were prepared without breaking vacuum by changing shadow masks in-situ. The resistance of tunnel junctions increased, but measured MR decreased with oxidization time. Negative MR was observed for samples of tunnel resistivity lower than 0.17 MΩ (㎛)². MR resistivity decreased with the change of substrates in the order of thermally oxidized Si(111), Si(100), Coring Glass 2948, Coming Glass 7059. Sign change and the variation of MR was explained with non uniform current effect.