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Modified magnetization and electron transition behavior in Bi2Fe4O9, Bi2Fe4O9-CoFe2O4and Bi2Fe4O9-NiFe2O4
Wang, Tiantian1; Deng, Hongmei2; Zhu, Liangqing1; Yang, Pingxiong1; Chu, Junhao1
2018
Source PublicationCeramics International
ISSN02728842
Volume44Issue:2Pages:2491-2495
AbstractMullite Bi2Fe4O9(BFO) and its composites with spinel CoFe2O4(CFO) and NiFe2O4(NFO) have been synthesized by solid-state reaction, exhibiting visible-light response and enhanced ferromagnetic order simultaneously at room-temperature. Independent phases have been detected in composite samples by XRD, Raman spectroscopy and further confirmed by SEM images. Calculated through XRD patterns, it can be found that not only the lattice parameters and crystallite size, but also the growth preference orientation of BFO could be effected by spinel magnetic content. Optical spectroscopy shows three absorption edges existed which indicates multiple electron transitions for BFO and its composites. Interband electron transition occurs at 1.56, 0.92 and 0.47 eV for BFO, BFO-NFO and BFO-CFO respectively. Furthermore, M-H hysteresis loops suggest enhanced ferromagnetism in composite samples due to magnetic spinel CFO and NFO phase. Different curve shape and remnant magnetization imply the different intrinsic magnetic nature of CFO and NFO. © 2017 Elsevier Ltd and Techna Group S.r.l.
DOI10.1016/j.ceramint.2017.10.231
PublisherElsevier Ltd
EI KeywordsIron compounds
EI Classification Number482.2 Minerals - 701.2 Magnetism: Basic Concepts and Phenomena - 708.4 Magnetic Materials - 802.2 Chemical Reactions - 933.1 Crystalline Solids - 951 Materials Science
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25301
Collection中国科学院上海硅酸盐研究所
Affiliation1.Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University, Shanghai; 200241, China;
2.Instrumental Analysis and Research Center, Institute of Materials, Shanghai University, 99 Shangda Road, Shanghai; 200444, China
Recommended Citation
GB/T 7714
Wang, Tiantian,Deng, Hongmei,Zhu, Liangqing,et al. Modified magnetization and electron transition behavior in Bi2Fe4O9, Bi2Fe4O9-CoFe2O4and Bi2Fe4O9-NiFe2O4[J]. Ceramics International,2018,44(2):2491-2495.
APA Wang, Tiantian,Deng, Hongmei,Zhu, Liangqing,Yang, Pingxiong,&Chu, Junhao.(2018).Modified magnetization and electron transition behavior in Bi2Fe4O9, Bi2Fe4O9-CoFe2O4and Bi2Fe4O9-NiFe2O4.Ceramics International,44(2),2491-2495.
MLA Wang, Tiantian,et al."Modified magnetization and electron transition behavior in Bi2Fe4O9, Bi2Fe4O9-CoFe2O4and Bi2Fe4O9-NiFe2O4".Ceramics International 44.2(2018):2491-2495.
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