Room-temperature ferromagnetism in MgO nanocrystalline powders
Room-temperature ferromagnetism in MgO nanocrystalline powders
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DOI：
10.1063/1.3021085
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发表时间：
2008-11-10
影响因子：
4
通讯作者：
Jiang, Minhua
中科院分区：
文献类型：
--
作者：
Hu, Jifan;Zhang, Zhongli;Jiang, Minhua
MgO nanocrystalline powders prepared by sol-gel method present room-temperature ferromagnetism, whereas MgO bulk exhibits diamagnetism. The vacuum annealing of MgO nanocrystalline powders reduces ferromagnetism. The observed room-temperature ferromagnetism in MgO nanocrystalline powders possibly originates from Mg vacancies at/near the surfaces of nanograins. Mg vacancies can induce local magnetic moments. Large concentrations of Mg vacancies at the surfaces of nanograins possibly establish magnetic percolation.
