Preparation method of low-dimensional insulating ferromagnetic LaCoO3 self-supporting film

By growing the water-soluble sacrificial layer and the Ru-based perovskite oxide film SRO buffer layer on the substrate, and quickly dissolving the SRO buffer layer by electrochemical voltage application method, the problem of difficulty in peeling off the LaCoO3 film is successfully solved, and the preparation of a high-quality, well-insulating and ferromagnetic LaCoO3 self-supporting film is achieved.

CN119822420APending Publication Date: 2025-04-15SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Application Number
CN202510026426.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-08
Publication Date
2025-04-15

AI Technical Summary

Technical Problem

The prior art is difficult to efficiently peel off high-quality LaCoO3 films from any substrate, resulting in the deterioration of its insulation ferromagnetic properties or disappearance.

Method used

By growing a water-soluble sacrificial layer and Ru-based perovskite oxide film SRO as a buffer layer on the substrate, and rapidly dissolving the SRO buffer layer by electrochemical voltage application method, thereby efficiently obtaining a low-dimensional insulated ferromagnetic LaCoO3 self-supporting film.

Benefits of technology

It realizes efficient peeling of LaCoO3 film, maintains the high quality and insulating ferromagnetic properties of the film, solves the performance degradation caused by mismatch between the film and the substrate interface structure, and has the advantages of high efficiency, low cost and easy industrialization.

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Abstract

The invention provides a preparation method of a low-dimensional insulating ferromagnetic LaCoO3 self-supporting thin film. According to the preparation method, the Ru-based perovskite oxide thin film SrRuO3 (SRO) is inserted to serve as the buffer layer, the problem that the LaCoO3 thin film cannot be stripped from any substrate can be solved, further, the Ru-based perovskite oxide thin film SRO on the surface can be rapidly dissolved within 10 seconds through an electrochemical voltage applying method, and the performance of the LaCoO3 thin film is improved. Therefore, the low-dimensional insulating ferromagnetic LaCoO3 self-supporting film with a clean surface can be efficiently obtained.
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