期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 28, 页码 8018-8022出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201603406
关键词
ferromagnetism; magnetoresistance; superparamagnetism; vanadium
资金
- National Basic Research Program of China [2015CB932302]
- National Natural Science Foundation of China [21222101, 21501164, U1432133, 11321503, J1030412]
- National Young Top-Notch Talent Support Program
- Chinese Academy of Sciences [XDB01020300]
- Fok Ying-Tong Education Foundation, China [141042]
- Fundamental Research Funds for the Central Universities [WK2060190027, WK2340000065, WK2310000055]
- Anhui Provincial Natural Science Foundation [1608085QA08]
One-dimensional (1D) transition metal oxide (TMO) nanostructures are actively pursued in spintronic devices owing to their nontrivial d electron magnetism and confined electron transport pathways. However, for TMOs, the realization of 1D structures with long-range magnetic order to achieve a sensitive magnetoelectric response near room temperature has been a longstanding challenge. Herein, we exploit a chemical hydric effect to regulate the spin structure of 1D V-V atomic chains in monoclinic VO2 nanowires. Hydrogen treatment introduced V3+ (3d(2)) ions into the 1D zigzag V-V chains, triggering the formation of ferromagnetically coupled V3+-V4+ dimers to produce 1D superparamagnetic chains and achieve large room-temperature negative magnetoresistance (-23.9%, 300 K, 0.5 T). This approach offers new opportunities to regulate the spin structure of 1D nanostructures to control the intrinsic magnetoelectric properties of spintronic materials.
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