Energetic perspective on emergent inductance exhibited by magnetic textures in the pinned regime

Furuta, Soju; Moody, Samuel Harrison; Kado, Kyohei; Koshibae, Wataru; Kagawa, Fumitaka

Abstract

Spatially varying magnetic textures can exhibit electric-current-induced dynamics as a result of the spin-transfer torque effect. When such a magnetic system is electrically driven, an electric field is generated, which is called the emergent electric field. In particular, when magnetic-texture dynamics are induced under the application of an AC electric current, the emergent electric field also appears in an AC manner, notably, with an out-of-phase time profile, thus exhibiting inductor behavior, often called an emergent inductor. Here we show that the emergent inductance exhibited by magnetic textures in the pinned regime can be explained in terms of the current-induced energy stored in the magnetic system. We numerically find that the inductance values defined from the emergent electric field and the current-induced magnetization-distortion energy, respectively, are in quantitative agreement in the so-called adiabatic limit. Our findings indicate that emergent inductors retain the basic concept of conventional inductors; that is, the energy is stored under the application of electric current.

Citation

Furuta, S., Moody, S. H., Kado, K., Koshibae, W., & Kagawa, F. (2023). Energetic perspective on emergent inductance exhibited by magnetic textures in the pinned regime. npj Spintronics, 1(1), Article 1. https://doi.org/10.1038/s44306-023-00004-1

• Journal Article Type: Article
• Acceptance Date: Oct 25, 2023
• Online Publication Date: Nov 22, 2023
• Publication Date: 2023
• Deposit Date: Nov 29, 2023
• Publicly Available Date: Nov 29, 2023
• Journal: npj Spintronics
• Electronic ISSN: 2948-2119
• Publisher: Springer Nature
• Peer Reviewed: Peer Reviewed
• Volume: 1
• Issue: 1
• Article Number: 1
• DOI: https://doi.org/10.1038/s44306-023-00004-1
• Public URL: https://durham-repository.worktribe.com/output/1949644