Dynamic and static properties of stadium-shaped antidot arrays

Abstract

In this work we performed a detailed numerical analysis on the static and dynamic properties of magnetic antidot arrays as a function of their geometry. In particular, we explored how by varying the shape of these antidot arrays from circular holes to stadium-shaped holes, we can effectively control the magnetic properties of the array. Using micromagnetic simulations we evidenced that coercivity is very sensitive to the shape of antidots, while the remanence is more robust to these changes. Furthermore, we studied the dynamic susceptibility of these systems, finding that it is possible to control both the position and the number of resonance peaks simply by changing the geometry of the holes. Thus, this work provides useful insights on the behavior of antidot arrays for different geometries, opening routes for the design and improvement of two-dimensional technologies.

Curvature-induced stabilization and field-driven dynamics of magnetic hopfions in toroidal nanorings

“…In this case, the magnetic field activates resonant modes that depend on the magnetic configuration of the nanostructure. We highlight that the pulse amplitude is small enough to ensure that the magnetic response of the system is in the linear regime [66,67]. The system's magnetization dynamics was determined from the model presented in section 2 and the results are presented in figures 3(b) and (c), which illustrate the frequency of the resonance modes as a function of H. To simplify our analysis, we focus only on those modes that are higher than 4% of the intensity of the main mode for H = 0.…”

Tuning Magnetic Properties of CoxNi100–x Nanodots: Micromagnetic Insights for Tailoring Enhanced Electrochemical Performance in Energy Storage Devices

“…In this regard, significant advances in the study of single nanomagnet dynamics were reported when Rana et al investigated the time-resolved precessional magnetization dynamics of an isolated 50 nm-wide square permalloy dot, revealing a dominant mode known as the edge mode (EM), in addition to the center mode (CM). It has been widely observed that the EM mode generally outweighs the CM, primarily because the EM is highly sensitive to imperfections, as well as variations in dot shape and size. − Thus, conducting simulations allows us to examine the quasi-static and dynamic aspects of magnetization, facilitating a comprehensive understanding of magnetic phenomena that are crucial for electrochemical applications.…”

Tailoring ferromagnetic resonance properties of cobalt nanowires: effects of shape and magnetocrystalline anisotropies

“…Over the past decade, there has been a noticeable upsurge in the publication of studies employing micromagnetic simulation software, such as OOMMF 16 or MuMax3, 17 either to bolster experimental findings or as a fundamental theoretical framework. Notably, researchers have extensively investigated the ferromagnetic resonance properties of a broad spectrum of magnetic nanosystems, including tubes, 18 wires, 19 dots, 20 rings, 21 and thin films, 22 among others. These investigations have consistently revealed that nanomaterial shapes and magnetic parameters can lead to distinct dynamic susceptibility behaviors.…”