Room temperature ferromagnetism in ZnO prepared by microemulsion
Source abstract
Abstract
Clear room temperature ferromagnetism has been observed in ZnO powders prepared by microemulsion. The O vacancy (VO) clusters mediated by the VO with one electron (F center) contributed to the ferromagnetism, while the isolated F centers contributed to the low temperature paramagnetism. Annealing in H2 incorporated interstitial H (Hi) in ZnO, and removed the isolated F centers, leading to the suppression of the paramagnetism. The ferromagnetism has been considered to originate from the VO clusters mediated by the Hi, leading to the enhancement of the coercivity. The ferromagnetism disappeared after annealing in air due to the reduction of Hi.
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Research context
OpenAlex topics: ZnO doping and properties · Copper-based nanomaterials and applications · Ga2O3 and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Southeast University 1 Department of Physics, , Nanjing 211189, China
Nanjing University 2 Department of Materials Science and Engineering, , Nanjing 210008, China
Nanjing University 3 Department of Physics, , Nanjing 210008, China
Nanjing University of aeronautics and Astronautics 4 School of Materials Science and Technology, , Nanjing 210016, China
Funding
National Natural Science Foundation of China
References (22)
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