Switching Mechanism in Ferromagnetic Nanorings

Details Switching Mechanism in Ferromagnetic Nanorings Switching Mechanism in Ferromagnetic Nanorings

2009-02-18

arxiv.org/abs/0902.3024v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

Ferromagnetic rings exhibit many novel physical phenomena with promise for potential applications. Here, we focus on switching processes which are fundamental properties of magnetic systems and are especially crucial for data storage applications. A brief introduction on the advantages of ring geometries is presented, followed by a background survey of the model and methods to study nanomagnetic elements. The relevant magnetic states identified until now are discussed, with special emphasis given to vortex, onion, and twisted states. Such states are potential candidates for data storage applications. Switching processes under uniform fields are categorized into three types, and their mechanisms are explained in detail. In particular, explanations from a topological point of view are shown to be enlightening. We conclude with a brief discursion of circular field switching and data storage applications of magnetic nanorings.

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