Control of vortex chirality in a symmetric ferromagnetic ring using ferromagnetic nanoelement
arxiv(2023)
摘要
Controlling the vortex chirality in ferromagnetic nanodots and nanorings has
been a topic of investigation for the last few years. Many control methods have
been proposed and it has been found that the control is related to the breaking
of the circular symmetry. In this paper, we present a theoretical study
demonstrating the control of chirality in ferromagnetic nanoring without
directly breaking its symmetry, but instead by placing elongated ferromagnetic
nanoelement inside the ring, Here, the stray magnetostatic field exerted by the
asymmetrically placed nanoelement determines the movement of the domain walls
upon remagnetization of the nanoring and the resulting chirality in the
remanence. This approach allows the chirality of the vortex state to be
controlled and also promises its control in a dense array of nanorings, thus
suitable for spintronic and magnonic applications.
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