All-Electrical 9-Bit Skyrmion-Based Racetrack Memory Designed with Laser Irradiation,Nano Letters

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All-Electrical 9-Bit Skyrmion-Based Racetrack Memory Designed with Laser Irradiation
Nano Letters ( IF 9.6 ) Pub Date : 2023-10-11 , DOI: 10.1021/acs.nanolett.3c02978
Bin He _{1,

2} , Riccardo Tomasello ₃ , Xuming Luo _{1,

2} , Ran Zhang _{1,

2} , Zhuyang Nie _{1,

2} , Mario Carpentieri ₃ , Xiufeng Han _{1,

2,

4} , Giovanni Finocchio ₅ , Guoqiang Yu _{1,

2,

4}

Affiliation

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.

中文翻译：

采用激光照射设计的全电 9 位基于斯格明子的赛道存储器

带有磁性斯格明子的赛道存储器最近被提议作为一种有前途的存储技术。为了吸引人，斯格明子的确定性生成、高保真传输和准确读取仍然必须面临一些挑战。在这里，我们首次实现了 9 位斯格明子赛道存储器的概念验证，并在同一设备中实现了全电气可控功能。关键成分是通过激光照射生成定制的不均匀分布的磁各向异性，以便（i）创建明确定义的斯格明子成核中心，（ii）定义承载编码为斯格明子存在/不存在的信息的存储单元，以及 (iii) 提高异常霍尔电阻测量的信噪比。这项工作引入了一种策略，将先前的发现和预测统一起来，以开发一代跑道存储器，对斯格明子成核和位置进行稳健控制，以及有效的斯格明子电检测。

更新日期：2023-10-11

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