Intrinsic room-temperature ferromagnetism in a two-dimensional semiconducting metal-organic framework.
Intrinsic room-temperature ferromagnetism in a two-dimensional semiconducting metal-organic framework.
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DOI：
10.1038/s41467-023-42844-9
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发表时间：
2023-11-03
影响因子：
16.6
通讯作者：
Yan, Wensheng
中科院分区：
文献类型：
--
作者：
Feng, Sihua;Duan, Hengli;Tan, Hao;Hu, Fengchun;Liu, Chaocheng;Wang, Yao;Li, Zhi;Cai, Liang;Cao, Yuyang;Wang, Chao;Qi, Zeming;Song, Li;Liu, Xuguang;Sun, Zhihu;Yan, Wensheng
发展具有室温铁磁性的二维磁性半导体是材料科学中的一个重大挑战，对下一代自旋电子器件的发展具有重要意义。在这里，我们证明了利用配体切割策略来调节铜二聚体内部的磁性相互作用，可以使二维半导体反铁磁性金属氧化物薄膜具有本征的室温铁磁耦合。利用元素选择X射线磁性圆二色谱(XMCD)技术，我们为本征铁磁性提供了明确的证据。详尽的结构表征证实，磁性耦合的变化是由于铜二聚体中铜原子间距离的增加引起的。理论计算表明，随着铜-铜距离的增加，铁磁耦合增强，从而抑制了最近的铜原子的3d轨道间的杂化。我们的工作为设计和制备MOF基半导体室温铁磁材料提供了一条有效的途径，并促进了它们在下一代自旋电子器件中的实际应用。二维磁性材料为自旋电子器件提供了一个很有前途的平台；然而，这些材料主要是绝缘的，或者是金属的。在这里，冯等人展示了一种具有本征铁磁性的半导体二维金属-有机骨架。
The development of two-dimensional (2D) magnetic semiconductors with room-temperature ferromagnetism is a significant challenge in materials science and is important for the development of next-generation spintronic devices. Herein, we demonstrate that a 2D semiconducting antiferromagnetic Cu-MOF can be endowed with intrinsic room-temperature ferromagnetic coupling using a ligand cleavage strategy to regulate the inner magnetic interaction within the Cu dimers. Using the element-selective X-ray magnetic circular dichroism (XMCD) technique, we provide unambiguous evidence for intrinsic ferromagnetism. Exhaustive structural characterizations confirm that the change of magnetic coupling is caused by the increased distance between Cu atoms within a Cu dimer. Theoretical calculations reveal that the ferromagnetic coupling is enhanced with the increased Cu-Cu distance, which depresses the hybridization between 3d orbitals of nearest Cu atoms. Our work provides an effective avenue to design and fabricate MOF-based semiconducting room-temperature ferromagnetic materials and promotes their practical applications in next-generation spintronic devices. Two-dimensional magnetic materials present a promising platform for spintronic devices; however, these are predominantly either insulting, or metallic. Here, Feng et al demonstrate a semiconducting two-dimensional metal-organic framework with intrinsic ferromagnetism.
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影响因子：
16.6
作者：
Ba Y;Zhuang S;Zhang Y;Wang Y;Gao Y;Zhou H;Chen M;Sun W;Liu Q;Chai G;Ma J;Zhang Y;Tian H;Du H;Jiang W;Nan C;Hu JM;Zhao Y
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作者：
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通讯作者：
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15
作者：
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通讯作者：
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影响因子：
19.6
作者：
Klein, Dahlia R.;MacNeill, David;Jarillo-Herrero, Pablo
通讯作者：
Jarillo-Herrero, Pablo