Analytic expression of the temperature increment in a spin transfer torque nanopillar structure
arXiv:0906.2248 · doi:10.1016/j.jmmm.2009.06.076
Abstract
The temperature increment due to the Joule heating in a nanopillar spin transfer torque system is investigated. We obtain a time dependent analytic solution of the heat conduction equation in nanopillar geometry by using the Green's function method after some simplifications of the problem. While Holm's equation is applicable only to steady states in metallic systems, our solution describes the time dependence and is also applicable to a nanopillar-shaped magnetic tunneling junction with an insulator barrier layer. The validity of the analytic solution is confirmed by numerical finite element method simulations and by the comparison with Holm's equation.
References in corpus (9)
- Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current
- Nonlocal magnetization dynamics in ferromagnetic heterostructures
- Non-collinear Magnetoelectronics
- Current-Driven Magnetic Excitations in Permalloy-Based Multilayer Nanopillars
- Field dependence of magnetization reversal by spin transfer
- Adjustable spin torque in magnetic tunnel junctions with two fixed layers
- Spin torque, tunnel-current spin polarization and magnetoresistance in MgO magnetic tunnel junctions
- Controlled normal and inverse magnetoresistance and current-driven magnetization switching in magnetic nanopillars
- Current-induced two-level fluctuations in pseudo spin-valves (Co/Cu/Co) nanostructures