Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (8): 139-144.doi: 10.3969/j.issn.1000-565X.2013.08.023

• Physics • Previous Articles    

Effects of Mn Doping on Structure and Magnetic Properties of Bismuth Ferrite

Chen Xi1 He Yong- hou1 Chen Long- sheng2   

  1. 1.School of Science,South China University of Technology,Guangzhou 510640,Guangdong,China;2.School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2013-03-25 Revised:2013-04-27 Online:2013-08-25 Published:2013-07-01
  • Contact: 陈熹(1972-)，男，教授，博士生导师，主要从事凝聚态物理研究． E-mail:xichen@scut.edu.cn
  • About author:陈熹(1972-)，男，教授，博士生导师，主要从事凝聚态物理研究．
  • Supported by:

    国家自然科学基金资助项目(11174082);华南理工大学中央高校基本科研业务费专项资金资助项目(2012ZZ0078)

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Abstract:

BiFe1－xMnxO3 ( 0≤ x ≤0.3)  crystal powders were synthesized via the sol- gel method,and the effects of Mn doping on the structure and magnetic properties of the product were investigated.XRD and Raman spectroscopy analyses reveal that Mn doping changes the crystal structure and vibration mode of BiFeO3.Rietveld refinement re-sults indicate that the substitution of Mn at Fe- site brings about a structural phase transition from the rhombohedral R3c to the orthorhombic Pbnm around x =0.1.Magnetic measurement results demonstrate that,with the increase of the Mn dosage x,the remanent magnetization gradually increases and reaches its maximum near the phase transition point.In addition,the enhanced magnetization of BiFe1－xMnxO3  strongly correlates with the variations of the crystal structural,which indicates that it is mainly attributed to the Dzyaloshinskii- Moriya interaction.

Key words: multiferroic material, rietveld refinement, magnetic property

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