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PREPARATION AND PROPERTIES OF Ni₈₀ Fe₂₀/Al₂O₃/Co MAGNETIC TUNNEL JUNCTIONS

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ã€Authorã€‘ CHEN Jing\ DU Jun\ WU Xiao\|Shan\ PAN Ming\|Hu\ LONG Jian\|Guo\ ZHANG Wei\ Lu Mu (Department of Physics,State Key Laboratory of Solid State Microstructures,Nanjing University,Nanjing\ 210093) ZHAI Hong\|Ru (Center for Materials Analysis,Nanjing Univers

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ã€Abstractã€‘ With plasma oxidization to create an insulating layer of Al\-2O\-3,we have repeatedly fabricated Ni 80 Fe 20 /Al\-2O\-3/Co magnetic tunnel junctions which show obvious tunneling magnetoresistance (TMR) effect.At room temperature,the maximum TMR ratio reaches 6 0%.The switch field can be less than 800A/m with a relative step width of about 2400A/m.The junction resistance changes from hundreds of ohms to hundreds of kilohms.æ›´å¤š è¿˜åŽŸ

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ã€Key wordsã€‘ magnetic tunnel junctionï¼› tunneling magnetoresistanceï¼›

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