Analysis of Magnetoresistance in Arrays of Connected Nano-Rings

摘要: We study the anisotropic magnetoresistance (AMR) of a 2-D periodic square array connected permalloy rings with periodicity 1 mum combining experimental and computational techniques. The model consists two parts: 1) computation magnetization 2) current density. For 1), we use standard micromagnetic methods. 2), start from potential difference applied across sample, compute resulting electric potential, subsequently corresponding density based on uniform conductivity. take into account backreaction magnetoresistive effects onto by self-consistently computing conductivity until they converge. compare experimentally measured AMR curve (as function field) numerically computed results find good agreement. numerical data provides insight characteristics data. Finally, demonstrate importance taking spatial variation when