• Title/Summary/Keyword: 자기터널접합

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Improvement of Substrate and Insulationg Layer of FM Magnetic Tunneling Jundtion and the Study of Magnetic Transport (기판과 부도체층을 개선한 $FM/Al_2O_3/FM$ (FM=Ferromagnet) 자기터널링 접합제작 및 자기수송에 관한 연구)

  • 변상진;박병기;장인우;염민수;이재형;이긍원
    • Journal of the Korean Magnetics Society
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    • v.9 no.5
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    • pp.245-250
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    • 1999

  • The effect of substrate and oxidization time on $substrate /Py/Al_2O_3/Co\;(Py=Ni_{81}Fe_{19})$ 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 observed for samples of tunnel resistivity lower than 0.17 M$\Omega$ $({\mu}m)^2$. MR resistivity decreased with the change of substrates in the order of thermally oxidized Si(111), Si(100), Coring Glass 2948, Corning Glass 7059. Sign change and the variation of MR was explained with non uniform current effect.

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