Static and dynamic properties of one-dimensional linear chain of nanomagnets

Abstract

We have probed the dynamic and static behavior of one-dimensional linear chain of magnetostatically coupled Ni80Fe20 elements using ferromagnetic resonance (FMR) spectroscopy and magneto-optic Kerr effect measurement techniques. When compared with isolated elements of similar dimensions, we observed that both the FMR curves and magnetization reversal process of the coupled elements are strongly influenced by the strong magnetostatic interactions. We have modeled the effect of magnetostatic coupling, by extracting the demagnetizing factors for the isolated element from the experimental data using least square fitting method. Our experimental results are in good agreement with theory. © 2011 American Institute of Physics.