High-Frequency Permeability of Adjacent Narrow Strips Having an Inclined Magnetic Anisotropy

Abstract

This study deals with a phenomenon of magnetic domain transition of adjacent narrow thin film strips with inclined uniaxial magnetic anisotropy. Our previous research shows that individual element with 70° inclined easy magnetization axis has a typical characteristic of the domain transition, and the transition can be controlled by the normal magnetic field. We also applied this phenomenon and controlling method to the two-dimensional configuration of line arrangement adjacent to many-body elements, in which mutual magnetic interaction exists. The result shows that the hidden inclined Landau–Lifshitz domain appears by applying a distributed normal field the same as an individual single element. This paper reports a comprehensive magnetic property, such as magnetic domains, magnetic hysteresis-loop (MH-loop), and high-frequency permeability of the adjacent many-body elements, in some fabrication conditions surrounding the exact condition where the hidden inclined Landau–Lifshitz domain appears. The result shows an estimation of a switched device of high-frequency permeability caused by the switched magnetic domain using the hidden domain and the control of distributed normal field. This phenomenon would be expected to apply functional devices, such as a switched inductor or a switched electromagnetic shielding, or a magnetic sensor.