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论文类型：期刊论文

发表时间：2012-04-15

发表刊物：JOURNAL OF APPLIED PHYSICS

收录刊物：SCIE、EI

卷号：111

期号：8

ISSN号：0021-8979

摘要：Hollow microstructures assembled of tetragonal MnO2 nano-columns have been synthesized through a facile hydrothermal method with the introduction of iron ions. The obtained samples were characterized by XRD, SEM, and vector network analysis. Results reveal that the presence of Fe3+ ions leads to transformation of phase structure from alpha-MnO2 to a mixture of epsilon-MnO2 and alpha-MnO2, and it is essential to include Fe3+ ions for the formation of the hollow MnO2 microstructures. The formation mechanism was investigated and proposed in detail. Fe-doped MnO2 exhibits decreased dielectric loss, but increased magnetic loss compared with the pure one. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4705516]