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Demonstration of Core Operations for Skyrmion Racetrack Memory Device
Seungmo Yang,Kyoung-Woong Moon,Tae-Seong Ju,Changsoo Kim,Hyun-Joong Kim,Juran Kim,Bao Xuan Tran,Jung-Il Hong,Chanyong Hwang 한국자기학회 2021 한국자기학회 학술연구발표회 논문개요집 Vol.31 No.1
Magnetic skyrmions, topological spin textures, have been intensively studied in spintronics as a prospective information carrier due to distinct topological features [1, 2]. Various skyrmion-related devices have been proposed including a logic device, a neuromorphic cell and a memory device. One of these proposals is a skyrmion racetrack memory, where information is encoded by magnetic skyrmions in a magnetic racetrack. Skyrmion racetrack memory device has attracted much attention as a promising alternative to the next-generation memory technology based on high density, high-speed and low power operation and topological stability. Skyrmion racetrack memory requires four core operations: electrical creation, deletion, shift and detection of isolated skyrmions. Therefore, the implementation of the four operations in a single device is the important experimental challenge for realizing skyrmion racetrack memory. Here, we demonstration of three core operations, skyrmion creation/deletion/shift, is a single three-terminal device and also present a proof-of-concept operation of skyrmion racetrack memory.