Simple and Rapid Controlling Method of Magnetic Anisotropy and Its Application to Thin-Film Magnetoimpedance Elements

Enhancing the control of magnetic anisotropy is key to boosting the performance of thin-film magnetic devices. We developed a simple and efficient method that combines Joule heating with a magnetic field, offering an alternative to conventional static magnetic field annealing, which typically requires complex setups, such as heaters, vacuum systems, and generating strong magnetic field with higher power consumption. Our results demonstrate that this method can be applied to thin-film magnetoimpedance elements in air within a very short time, without degrading their performance. The study also explores additional topics, including localized control, reversibility, a range of applicable materials, and the potential limitations of the approach.