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Temperature Gradient Effects on Spin Torque in Double Barrier Magnetic Tunnel Junctions with a Non-magnetic Metal Spacer
- Source :
- Journal of Superconductivity and Novel Magnetism. 30:1593-1597
- Publication Year :
- 2017
- Publisher :
- Springer Science and Business Media LLC, 2017.
-
Abstract
- Temperature gradient effects on spin torque (ST) are studied in MgO-based double-barrier magnetic tunnel junctions (DBMTJs) with a non-magnetic metal (NM) spacer. Using non-equilibrium Green’s function (NEGF) formalism, it is found that the thermal ST (TST) show oscillatory behavior with an increase of theNM spacer thickness. The results also show a magnitude enhancement of the TST in a DBMTJ compared with a single-barrier MTJ (SBMTJ). Such behavior is related to the existence of the quantum well states inside the NM spacer and resonant tunneling effect. Therefore, a faster magnetization switching is possible by TST in a DBMTJ without any bias voltage.
- Subjects :
- Materials science
Condensed matter physics
Biasing
Quantum well states
02 engineering and technology
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Electronic, Optical and Magnetic Materials
Metal
Magnetization
Temperature gradient
visual_art
0103 physical sciences
Thermal
visual_art.visual_art_medium
Torque
010306 general physics
0210 nano-technology
Quantum tunnelling
Subjects
Details
- ISSN :
- 15571947 and 15571939
- Volume :
- 30
- Database :
- OpenAIRE
- Journal :
- Journal of Superconductivity and Novel Magnetism
- Accession number :
- edsair.doi...........69497fa16a76df53eff8bde452d458f3