The effect of the size of the system, aspect ratio and impurities concentration on the dynamic of emergent magnetic monopoles in artificial spin ice systems

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:340

Article

Leon, Alejandro

关键词: Magnetic monopole;    Spin ice;    Aspect ratio;   

DOI  :  10.1016/j.jmmm.2013.03.034

来源: Elsevier

【 摘 要 】

In this work we study the dynamical properties of a finite array of nanomagnets in artificial kagome spin ice at room temperature. The dynamic response of the array of nanomagnets is studied by implementing a frustrated celular automata (FCA), based in the charge model and dipolar model. The FCA simulations allow us to study in real-time and deterministic way, the dynamic of the system, with minimal computational resource. The update function is defined according to the coordination number of vertices in the system. Our results show that for a set geometric parameters of the array of nanomagnets, the system exhibits high density of Dirac strings and high density emergent magnetic monopoles. A study of the effect of disorder in the arrangement of nanomagnets is incorporated in this work. (C) 2013 Elsevier B.V. All rights reserved.

【 授权许可】

Free