Domain wall motion in micron-sized permalloy elements

Current-induced domain wall motion in nanoscale ferromagnetic elements

We review the details of domain wall (DW) propagation due to spin-polarized currents that could potentially be used in magnetic data storage devices based on domains and DWs. We discuss briefly the basics of the underlying spin torque effect and show how the two torques arising from the interaction between the spin-polarized charge carriers and the magnetization lead to complex dynamics of a sp...

Magnetic domain wall engineering in a nanoscale permalloy junction

Engineering Magnetic Domain-Wall Structure in Permalloy Nanowires

Domain wall traps for low-field switching of sub-micron elements

In magnetic random access memory (MRAM), power consumption depends on the coercivity of the magnetic elements in the memory cells. In this paper a new method is described that uses a “domain wall trap” element shape to reduce both the coercivity and the dependence of coercivity on element size in submicron magnetic elements. Micromagnetic simulations of a shaped Permalloy element show coercivit...

Domain wall motion in nanowires

We investigated the motion of domain walls in ferromagnetic cylindrical nanowires by solving the Landau Lifshitz Gilbert equation numerically for a classical spin model in which energy contributions from exchange, crystalline anisotropy, dipole dipole interactions, and a driving magnetic field are considered. Depending on the diameter, either transverse domain walls or vortex walls are found. A...