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TMR of double spin-valve type AF/FM/I/FM/I/FM/AF magnetic tunneling junctions

An unusually large enhancement of TMR at 77 K was observed in double barrier tunnel junctions (DBTJ). This is explained with extended Julliere's model which yields a twice larger TMR value. When the spin coherence length is much smaller at higher temperature, DBTJ is shown to work as a series o...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2002-02, Vol.240 (1), p.137-139
Main Authors: Lee, J.H., Chang, In-Woo, Byun, S.J., Hong, T.K., Rhie, K., Lee, W.Y., Shin, Kyung-Ho, Hwang, Chanyong, Lee, S.S., Lee, B.C.
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Language:English
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Summary:An unusually large enhancement of TMR at 77 K was observed in double barrier tunnel junctions (DBTJ). This is explained with extended Julliere's model which yields a twice larger TMR value. When the spin coherence length is much smaller at higher temperature, DBTJ is shown to work as a series of two single barrier tunnel junctions.
ISSN:0304-8853
DOI:10.1016/S0304-8853(01)00761-2