Theory of Spin Torque Switching Current for the Double Magnetic Tunnel Junction
A single-domain model for spin-transfer torque switching of double magnetic tunnel junctions with perpendicularly magnetized layers is developed. An analytical formula is derived for the switching current threshold, I c0 . Surprisingly, the model predicts that the switching current can be reduced by...
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Published in | IEEE magnetics letters Vol. 8; pp. 1 - 5 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
IEEE
2017
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Subjects | |
Online Access | Get full text |
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Summary: | A single-domain model for spin-transfer torque switching of double magnetic tunnel junctions with perpendicularly magnetized layers is developed. An analytical formula is derived for the switching current threshold, I c0 . Surprisingly, the model predicts that the switching current can be reduced by a factor of 10 compared to single magnetic tunnel junctions, for sufficiently large spin-polarizations. This effect is explained in terms of the "enhanced antiparallel-to-parallel" spin torque, familiar from single magnetic tunnel junctions. |
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ISSN: | 1949-307X 1949-3088 |
DOI: | 10.1109/LMAG.2017.2707331 |