科研之友
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摘要
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 %26quot;Pac-man-like%26quot; (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.
- 出版日期2012-9
- 单位中国科学院电工研究所
