Micromagnetic Simulations of Pac-Man-Like Nanomagnets for Memory Applications
In this work we study magnetic properties of nanomagnets with lateral dimensions 50–100 nm. These structures have a potential of producing static memories with high storage densities. If simple disk is used as basic nanomagnet, its chirality and polarity cannot be read/write easily by in-plane magnetic field. Based on micromagnetic calculations, we have designed “Pac-man-like” (PL) nanomagnet and calculated its magnetic properties using the oommf code. It solves the micromagnetic problem using the Landau–Lifshitz–Gilbert equation. The calculations have shown, that in the PL shape both, the chirality and the polarity, can be controlled by the in-plane magnetic field with x,y components. The PL shape opens straight channel for the energy relaxation towards stable vortex state with defined chirality and polarity for thickness 32–48 nm, and diameter 50–78 nm.
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Document Type: Research Article
Publication date: September 1, 2012
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