Micromagnetic model for studies on Magnetic Tunnel Junction switching dynamics, including local current density

We present a model introducing the Landau–Lifshitz–Gilbert equation with a Slonczewski's Spin-Transfer-Torque (STT) component in order to take into account spin polarized current influence on the magnetization dynamics, which was developed as an Object Oriented MicroMagnetic Framework extension...

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Bibliographic Details
Published inPhysica. B, Condensed matter Vol. 435; pp. 105 - 108
Main Authors Frankowski, Marek, Czapkiewicz, Maciej, Skowroński, Witold, Stobiecki, Tomasz
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.02.2014
Subjects
Condensed matter
Density
Dynamic tests
Dynamics
Local current
Magnetization
Mathematical models
Micromagnetism
MTJ
OOMMF
Simulation
STT
Switching
OOMMF
Micromagnetism
STT
MTJ
Simulation
Switching
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Summary:We present a model introducing the Landau–Lifshitz–Gilbert equation with a Slonczewski's Spin-Transfer-Torque (STT) component in order to take into account spin polarized current influence on the magnetization dynamics, which was developed as an Object Oriented MicroMagnetic Framework extension. We implement the following computations: magnetoresistance of vertical channels is calculated from the local spin arrangement, local current density is used to calculate the in-plane and perpendicular STT components as well as the Oersted field, which is caused by the vertical current flow. The model allows for an analysis of all listed components separately, therefore, the contribution of each physical phenomenon in dynamic behavior of Magnetic Tunnel Junction (MTJ) magnetization is discussed. The simulated switching voltage is compared with the experimental data measured in MTJ nanopillars.
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ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2013.08.051