TY - JOUR
T1 - Ho-Ion-Polymer/Graphene Heterojunctions Toward Room-Temperature Ferromagnets
AU - Xia, Wenlai
AU - Li, Chenjian
AU - Zhang, Shixian
AU - Wang, Xuelin
AU - Wang, Shan
AU - Yang, Quanling
AU - Li, Wei
AU - Xiong, Chuanxi
AU - Huang, Jing
AU - Wang, Qing
N1 - Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023/6/21
Y1 - 2023/6/21
N2 - 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.
AB - 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.
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U2 - 10.1002/smll.202300385
DO - 10.1002/smll.202300385
M3 - Article
C2 - 36929570
AN - SCOPUS:85150755152
SN - 1613-6810
VL - 19
JO - Small
JF - Small
IS - 25
M1 - 2300385
ER -