Abstract
Abstract
Effective control of domain wall (DW) injection and motion in a ferromagnetic nanostrip is of great significance for the development of DW-based spintronic devices. In this work, we exploit the properties of 90° magnetization walls induced by a modified perpendicular magnetic anisotropy (PMA) between the out-of-plane and in-plane magnetized regions of Pt/Co, with spin-transfer torque (STT) being used to control the injection of DWs into a ferromagnetic nanostrip. We demonstrate that this STT stimulus combined with the modified PMA enables the continuous and synchronous injection of a series of head-to-head and tail-to-tail transverse in-plane DWs. Furthermore, micromagnetic simulation results show that the presence of a 90° magnetized transition region is a prerequisite for magnetic DW injection, and that the generation frequency can be controlled reversibly from the MHz to the multi-GHz range. Our findings demonstrate the feasibility of a highly tunable and direct-current-controlled transverse in-plane DW signal source, which could pave the way toward compact and integrated DW circuits and oscillators.
Funder
Natural Science Foundation of Zhejiang Province
National Natural Science Foundation of China
Fundamental Research Funds for the Provincial Universities of Zhejiang
Subject
Surfaces, Coatings and Films,Acoustics and Ultrasonics,Condensed Matter Physics,Electronic, Optical and Magnetic Materials
Cited by
1 articles.
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