On the micromagnetic behavior of dipolar-coupled nanomagnets in defective square artificial spin ice systems

Abstract

We report here the results of micromagnetic simulations of square artificial spin ice (ASI) systems with defects. The defects are introduced by misaligning of a nanomagnet at the vertex. In these defective systems, we are able to stabilize emergent monopole-like state by applying a small external field. We observe a systematic change of dipolar energies of the systems with varying misalignment angle. The fields at which the emergent monopoles are created vary linearly with the dipolar energies of the systems. Our results clearly show that the magnetization reversal of the ASI systems is intricately related to the interplay of defects and dipolar interactions.

5 pages, 5 figures

References in corpus (4)

• Artificial "spin ice" in a geometrically frustrated lattice of nanoscale ferromagnetic islands
• Nambu monopoles interacting with lattice defects in two-dimensional artificial square spin ice
• Ice Rule Fragility via Topological Charge Transfer in Artificial Colloidal Ice
• Tuning magnetic charge population and mobility in unidirectional array of nanomagnets as a function of lattice parameters

Cited by in corpus (6)

• Accessing low-energy magnetic microstates in symmetry-broken isolated square artificial spin ice vertices with magnetic field
• Magnetization reversal of dipolar coupled nanomagnets studied by two-dimensional electron gas based micro-Hall magnetometry
• Tailoring magnetization reversal of a single-domain bar nanomagnet via its end geometry
• Controlled creation and annihilation of stringless robust emergent magnetic monopoles in artificial spin ice
• Angle Selective Piezoelectric Strain Controlled Magnetization Switching in Artificial Spin Ice Based Multiferroic System
• Controlling degeneracy and magnetization switching in an artificial spin ice system of peanut-shaped nanomagnets