收稿日期: 2014-03-17
修回日期: 2014-04-29
网络出版日期: 2015-01-15
基金资助
973项目(2010CB833101)和国家自然科学基金(21072221)资助
Structure and magnetic and electronic properties of CoFe1.9Nb0.1O4
Received date: 2014-03-17
Revised date: 2014-04-29
Online published: 2015-01-15
余远 , 郝永梅 . CoFe1.9Nb0.1O4结构与磁电性能[J]. 中国科学院大学学报, 2015 , 32(1) : 46 -50 . DOI: 10.7523/j.issn.2095-6134.2015.01.008
CoFe1.9Nb0.1O4 phase was synthesized through solid-state reaction. Rietveld refinement shows that it has cubic spinel structure in the Fd-3m space group. Nb replaces Fe mainly in B site, leading to significant effects on the magnetic and electronic properties. The substitution weakens the ferromagnetic property of CoFe2O4, but improves its dielectric characteristics. An obvious dielectric relaxor behavior is observed in CoFe1.9Nb0.1O4, which is mainly attributed to the mixed-valence of Fe induced by the Nb-doping. Because of high-leakage current of CoFe1.9Nb0.1O4, only a P-E loop of low-quality is recorded.
Key words： ferrite; multiferroic; dielectric; magnetic property; Nb-doping
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