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5. CoFeB Thickness Dependence of Thermal Stability Factor in CoFeB/MgO Perpendicular Magnetic Tunnel Junctions.

Author

Sato, H., Yamanouchi, M., Miura, K., Ikeda, S., Koizumi, R., Matsukura, F., and Ohno, H.

Abstract

Thermal stability factor \Delta of the recording layer was studied in perpendicular anisotropy CoFeB/MgO magnetic tunnel junctions (p-MTJs) with various CoFeB recording layer thicknesses and junction sizes. In all series of p-MTJs with different thicknesses, \Delta is virtually independent of the junction sizes of 48–81 nm in diameter. The values of \Delta increase linearly as the recording layer thickness increases. The slope of the linear fit is explained well by a model based on nucleation-type magnetization reversal. [ABSTRACT FROM PUBLISHER]

Published
2012
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