Atomic scale design and control of cation distribution in hexagonal ferrites for passive and tunable microwave magnetic device applications

Abstract

A vast body of knowledge on the structure and properties of hexagonal ferrites has been accumulated in the last sixty years driven in part by the technological significance of these materials in diverse applications, such as permanent magnets, microwave devices, and magnetic recording media. In this work, the Alternating Target Laser Ablation Deposition (ATLAD) technique is applied in the growth of epitaxial hexagonal ferrite films. As a result, unique magnetic properties, including 50 degrees increase in the Néel temperature and 20% increase in the saturation magnetization compared to conventionally prepared materials, are realized by controlling the cation distribution at the atomic scale.