Adjustable spin torque in magnetic tunnel junctions with two fixed layers
By G. Fuchs, I. Krivorotov, Patrick M. Braganca, N. Emley, A. Garcia, D. Ralph, Robert A. Buhrman. 2005
138 citations recorded by the source corpus.
We have fabricated nanoscale magnetic tunnel junctions (MTJs) with an additional fixed magnetic layer added above the magnetic free layer of a standard MTJ structure. This acts as a second source of spin-polarized electrons that, depending on the relative alignment of the two fixed layers, either augments or diminishes the net spin torque exerted on the free layer. The compound structure allows a quantitative comparison of spin torque from tunneling electrons and from electrons passing through metallic spacer layers, as well as analysis of Joule self-heating effects. This has significance for current-switched magnetic random access memory, where spin torque is exploited and, for magnetic sensing, where it is detrimental.
Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/ca1a3ba841307a69506ecb28b40aa2b7e610eae0
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In Atomic and Molecular Physics, and Optics
- C. Marrows
- D. Ralph
- Robert A. Buhrman
- J. Sankey
- Fumihiro Matsukura
- J. Slonczewski
- Jonathan Z. Sun
- Shoji Ikeda
In Materials Chemistry
Citations in the corpus
- Magnetic Tunnel Junctions for Spintronic Memories and Beyond (2007, background): “The Al-O-barrier MTJs have JC similar to CCP-GMR pillars and exhibit TMR ratio of 10%–30% [44]–[47].”
- Compact Modeling of Perpendicular-Anisotropy CoFeB/MgO Magnetic Tunnel Junctions (2012, unknown): “obtained with the following equation [35].”
- Measurement of the spin-transfer-torque vector in magnetic tunnel junctions (2007, background): “The upturn in the apparent value of d τ p / d V might conceivably be caused by hot-electron effects or heatin”
- Spin-polarised currents and magnetic domain walls (2005, background): “able to tune the spin-transfer torque up or down in MTJ devices by the addition of a further ferromagnetic polarising layer [449].”