Large magnetoresistance using hybrid spin filter devices

A magnetic “spin filter” tunnel barrier, sandwiched between a nonmagnetic metal and a magnetic metal, is used to create a magnetoresistive tunnel device, somewhat analogous to an optical polarizer-analyzer configuration. The resistance of these trilayer structures depends on the relative magnetizati...

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Bibliographic Details
Published in:Applied physics letters 2002-01, Vol.80 (4), p.625-627
Main Authors: LeClair, P., Ha, J. K., Swagten, H. J. M., Kohlhepp, J. T., van de Vin, C. H., de Jonge, W. J. M.
Format: Article
Language:English
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Summary:A magnetic “spin filter” tunnel barrier, sandwiched between a nonmagnetic metal and a magnetic metal, is used to create a magnetoresistive tunnel device, somewhat analogous to an optical polarizer-analyzer configuration. The resistance of these trilayer structures depends on the relative magnetization orientation of the spin filter and the ferromagnetic electrode. The spin filtering in this configuration yields a previously unobserved magnetoresistance effect, exceeding 100%.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1436284