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- Title
Hydrogen Treatment for Superparamagnetic VO<sub>2</sub> Nanowires with Large Room-Temperature Magnetoresistance.
- Authors
Zejun Li; Yuqiao Guo; Zhenpeng Hu; Jihu Su; Jiyin Zhao; Junchi Wu; Jiajing Wu; Yingcheng Zhao; Changzheng Wu; Yi Xie
- Abstract
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+ (3d2) 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.
- Subjects
HYDROGEN spectra; SUPERPARAMAGNETIC materials; NANOWIRES; SYNTHESIS of nanowires; TRANSITION metal oxides; THERMAL properties
- Publication
Angewandte Chemie International Edition, 2016, Vol 55, Issue 28, p8018
- ISSN
1433-7851
- Publication type
Article
- DOI
10.1002/anie.201603406