: Racetrack memories with magnetic skyrmions have recently been proposed as a promising storage technology. To be appealing, several challenges must still be faced for the deterministic generation of skyrmions, their high-fidelity transfer, and accurate reading. Here, we realize the first proof-of-concept of a 9-bit skyrmion racetrack memory with all-electrical controllable functionalities implemented in the same device. The key ingredient is the generation of a tailored nonuniform distribution of magnetic anisotropy via laser irradiation in order to (i) create a well-defined skyrmion nucleation center, (ii) define the memory cells hosting the information coded as the presence/absence of skyrmions, and (iii) improve the signal-to-noise ratio of anomalous Hall resistance measurements. This work introduces a strategy to unify previous findings and predictions for the development of a generation of racetrack memories with robust control of skyrmion nucleation and position, as well as effective skyrmion electrical detection.
All-Electrical 9-Bit Skyrmion-Based Racetrack Memory Designed with Laser Irradiation / He, Bin; Tomasello, Riccardo; Luo, Xuming; Zhang, Ran; Nie, Zhuyang; Carpentieri, Mario; Han, Xiufeng; Finocchio, Giovanni; Yu, Guoqiang. - In: NANO LETTERS. - ISSN 1530-6984. - STAMPA. - 23:20(2023), pp. 9482-9490. [10.1021/acs.nanolett.3c02978]
All-Electrical 9-Bit Skyrmion-Based Racetrack Memory Designed with Laser Irradiation
Tomasello, Riccardo;Carpentieri, Mario;
2023-01-01
Abstract
: Racetrack memories with magnetic skyrmions have recently been proposed as a promising storage technology. To be appealing, several challenges must still be faced for the deterministic generation of skyrmions, their high-fidelity transfer, and accurate reading. Here, we realize the first proof-of-concept of a 9-bit skyrmion racetrack memory with all-electrical controllable functionalities implemented in the same device. The key ingredient is the generation of a tailored nonuniform distribution of magnetic anisotropy via laser irradiation in order to (i) create a well-defined skyrmion nucleation center, (ii) define the memory cells hosting the information coded as the presence/absence of skyrmions, and (iii) improve the signal-to-noise ratio of anomalous Hall resistance measurements. This work introduces a strategy to unify previous findings and predictions for the development of a generation of racetrack memories with robust control of skyrmion nucleation and position, as well as effective skyrmion electrical detection.File | Dimensione | Formato | |
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