Designing hysteresis with dipolar chains

Abstract

Materials that have a hysteretic response to an external field are essential in modern information storage and processing technologies. The magnetization curves of several natural and artificial materials have previously been measured and explained in terms of the Neel model, Preisach phenomenological model, the creation, propagation, and annihilation of topological defects, or by resonant quantum tunnelling of the magnetization in single molecule magnets. However, a simple way to design the magnetic response of a material is missing. Here, we propose and experimentally realize an elementary method to engineer hysteresis loops in metamaterials built out of dipolar chains. We show that by tuning the system's interactions and geometry we can induce magnetic responses with or without remanence at will. Our findings pave the way for the rational design of hysteretical responses in a variety of physical systems such as dipolar cold atoms, ferroelectrics, or artificial magnetic lattices, among others.

6 Pages, 4 figures

References in corpus (4)

• Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
• Programmable Mechanical Metamaterials
• Fractional vortices and composite domain walls in flat nanomagnets
• Macroscopic magnetic frustration

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• Chiral magnetic phases in Moire bilayers of magnetic dipoles
• Macroscopic bioinspired magnetic active matter and the physical limits of magnetotaxis
• Nonlinear dynamics of a hanging string with a freely pivoting attached mass
• Nonmonotonic Magnetic Friction from Collective Rotor Dynamics
• Chiral and Clock phases in Twisted Dipolar Clusters