Modified structural and magnetic properties of nanocrystalline MnFe₂O₄ by pH in capping agent free co-precipitation method

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• 作者：P. Iranmanesh^a ; ^{p.iranmanesh@vru.ac.ir} ; ^{p.iranmanesh@gmail.com} ; S. Saeednia^b ; M. Mehran^a ; S. Rashidi Dafeh^a
• 关键词：MnFe2O4 nanoparticles ; Superparamagnetism ; pH value ; Cation inversion ; Quantum size effect
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：425
• 期：Complete
• 页码：31-36
• 全文大小：624 K
• 卷排序：425

文摘

We study effect of pH on the size and magnetic properties of MnFe2O4 nanoparticles. MnFe2O4 were synthesized by co-precipitation method without any capping agent. The physical properties are affected by cation contribution and surface effects. The smaller nanoparticles with larger pH show a red shift in the band gap energy. The Ms is less than its value of bulk ones due to surface effects.