A method and device for generating and erasing magnetic skyrmions by photoinduced strain
Through the photostrain regulation method of photo-strain substrate, the nucleation energy threshold of magnetic sgmectons is reduced, the problem of high energy consumption in the prior art is solved, low-energy consumption and stable sgmecton generation and erasure is achieved, and device miniaturization is promoted.
CN114335332BActive Publication Date: 2025-09-05SOUTH CHINA NORMAL UNIV
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Patent Information
- Application Number
- CN202111428655.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-11-29
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2041-11-29
AI Technical Summary
Technical Problem
In the prior art, the current-induced magnetic sgmidone method consumes high energy and is not conducive to device miniaturization and stability.
Method used
Using a photo-strain induction method, a photo-strain substrate of azobenzene liquid crystal film is used to generate strain in a magnetic multi-period film through cis-trans isomerization regulation of photo-to-azo bonds, reducing the nucleation energy threshold of Sgmingson.
Benefits of technology
The production and erase of sgmidone at low energy consumption is achieved, which improves the stability of the device and is conducive to the development of device miniaturization.
✦ Generated by Eureka AI based on patent content.
Abstract
A method for generating and erasing magnetic skyrmions using photoinduced strain induction includes the following steps: S1: preparing a magnetic multi-period film with a critical anisotropy between perpendicular and horizontal anisotropy on an azobenzene liquid crystal film by magnetron sputtering; S2: fabricating a magnetic nanodot array on the magnetic multi-period film prepared in step S1 using micro-nanofabrication technology; S3: generating skyrmions using photoinduced strain by applying a 355-375 nm light pulse; S4: erasing skyrmions using photoinduced strain by applying a 510-530 nm light pulse to destabilize the skyrmion state and restore it to a ferromagnetic state. The present invention also provides a device for writing and erasing magnetic skyrmions, comprising a magnetic multi-period film, a photoinduced strain substrate, and a photoinduced unit. The method and device of the present invention consume low energy to generate and erase skyrmions, enhance device stability, and facilitate device miniaturization.
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