Spatial and temporal distributions of magnetisation in arrays of interacting bistable microwires

The unbalanced distribution of magnetic poles at the ends of the bistable Fe-based magnetostrictive glass-coated amorphous microwires generates a magnetic stray field that interacts with magnetisation in neighbouring microwires. A theoretical model is developed to analyse the magnetisation process of a two-dimensional array of quasi-identical microwires, taking into account the symmetry of the distribution (hexagonal, cubic, random), the number of microwires, and the distance between them. The conditions are analysed for arrays which behave as a complex system, specifically a system with self-organised criticality where both distributions of microwires with parallel and antiparallel magnetisation follow a fractal patron, and also conditions when individual magnetisation reversals in the array extend to the neighbours, as well as the possibility of application of this effect in magnetic recording devices.