Doping effect of Y3 ions on the microstructural and electromagnetic properties of Mn-Zn ferrites

作者：Xing, Qingkai; Peng, Zhijian^*; Wang, Chengbiao; Fu, Zhiqiang; Fu, Xiuli

来源：Physica B: Condensed Matter , 2012, 407(3): 388-392.

DOI：10.1016/j.physb.2011.11.003

• Mn-Zn ferrite
• Y3 ion
• Doping
• Electromagnetic properties

Mn-Zn ferrites doped with different contents of Y3+ ions were prepared by conventional two-step synthesis method. The microstructure and electromagnetic properties of the as-prepared Mn-Zn ferrites were investigated. It was found that all the samples consisted of ferrite phases of typical spinel cubic structure, and when Y3+ ion content was upto 1.5 mol%, yttriumirongarnet (Y3Fe5O12) phase with garnet structure was detected. With increasing doping content of Y3+ ions, the lattice constant and grain size increased, and after an increase to its maximum value, the sample apparent and relative densities dropped down. Through the analysis of magnetic properties, it was revealed that the saturation magnetization, and both the real and imaginary parts of permeability of the as-prepared samples raised with increasing doping content of Y3+ ions but decreased with more Y3+ ions, while their coercivity showed an opposite change trend; and the Curie temperature increased monotonously. The measurement of dielectric properties indicated that the dielectric constant of the doped Mn-Zn ferrites presented a rise with increasing Y3+ ion content, and dropped down gradually when more Y3+ ions were doped, while the dielectric loss tangent would decrease with Y3+ content upto 1.5 mol%, but after that, it increased.

• 出版日期2012-2-1
• 单位中国地质大学（北京）; 北京邮电大学