期刊
APPLIED PHYSICS LETTERS
卷 94, 期 6, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3072342
关键词
magnetic core stores; magnetic cores; magnetic storage; magnetic switching; magnetisation; micromagnetics; random-access storage; spin polarised transport; vortices
资金
- Deutsche Forschungsgemeinschaft
- Functional metal-semiconductor hybrid systems and via the SFB 668
- Magnetismus vom Einzelatom zur Nanostruktur
We demonstrate by micromagnetic simulations that magnetic antivortices are potential candidates for fast nonvolatile data-storage elements. These storage elements are excited simultaneously by alternating spin-polarized currents and their accompanying Oersted fields. Depending on the antivortex-core polarization p and the orientation of the in-plane magnetization c around the core, the superposition of current and field leads to either a suppression of gyration (logical zero) or an increased gyration amplitude (logical one). Above an excitation threshold the gyration culminates in the switching of the antivortex core. The switching can be seen as a cp-dependent writing of binary data, allowing to bring the antivortex into a distinct state. Furthermore a read-out scheme using an inductive loop situated on top of the element is investigated.
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