Volume 19, Issue 25 2300385
Research Article

Ho-Ion-Polymer/Graphene Heterojunctions Toward Room-Temperature Ferromagnets

Wenlai Xia

Wenlai Xia

State Key Laboratory of Silicate Materials for Architectures, School of Materials Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070 P. R. China

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Chenjian Li

Chenjian Li

State Key Laboratory of Silicate Materials for Architectures, School of Materials Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070 P. R. China

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Shixian Zhang

Shixian Zhang

State Key Laboratory of Silicate Materials for Architectures, School of Materials Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070 P. R. China

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Xuelin Wang

Xuelin Wang

State Key Laboratory of Silicate Materials for Architectures, School of Materials Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070 P. R. China

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Shan Wang

Shan Wang

State Key Laboratory of Silicate Materials for Architectures, School of Materials Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070 P. R. China

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Quanling Yang

Quanling Yang

State Key Laboratory of Silicate Materials for Architectures, School of Materials Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070 P. R. China

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Wei Li

Wei Li

State Key Laboratory of Silicate Materials for Architectures, School of Materials Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070 P. R. China

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Chuanxi Xiong

Corresponding Author

Chuanxi Xiong

State Key Laboratory of Silicate Materials for Architectures, School of Materials Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070 P. R. China

E-mail: [email protected]; [email protected]; [email protected]

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Jing Huang

Corresponding Author

Jing Huang

State Key Laboratory for New Textile Materials & Advanced Processing Technology, School of Materials Science and Engineering, Wuhan Textile University, Sunshine Avenue 1, Wuhan, 430200 P. R. China

E-mail: [email protected]; [email protected]; [email protected]

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Qing Wang

Corresponding Author

Qing Wang

State Key Laboratory of Silicate Materials for Architectures, School of Materials Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070 P. R. China

Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania, 16802 USA

E-mail: [email protected]; [email protected]; [email protected]

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First published: 16 March 2023
Citations: 3

Abstract

Organic ferromagnetic materials offer great promise for spintronic devices, carbon-based chips, and quantum communications, but remain as a challenging issue due to their low saturation magnetization and/or unsustainable ferromagnetic properties. To date, magnetic ion polymers have displayed paramagnetism without exception at room-temperature. In this study, it is reported for the first time that, owing to the structural restriction and charge exchange of Ho ion by polymer/graphene π–π stacking heterojunctions, holmium ion polymer composites exhibited typical hysteresis lines of ferromagnetic materials at room temperature. The room-temperature ferromagnetic ion polymer composite presented the highest saturation magnetization value of 3.36 emu g−1 and unprecedented sustainable ferromagnetism, compared to reported room-temperature organic ferromagnetic materials. Accordingly, prepared ferromagnetic composites also achieved impressive wave absorption properties, with a maximum reflection loss of as much as −57.32 dB and a broad absorption bandwidth of 5.05 GHz. These findings may promote the development of room-temperature organic ferromagnetic materials.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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