Magnetic properties of In3+ and Cr3+ substituted Mg-Mn ferrites
Magnetic properties of In3+ and Cr3+ substituted Mg-Mn ferrites
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DOI：
10.1016/s0304-8853(02)00359-1
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发表时间：
2002-09-01
影响因子：
2.7
通讯作者：
Mendiratta, RG
中科院分区：
文献类型：
--
作者：
Lakshman, A;Rao, KH;Mendiratta, RG
用传统的陶瓷工艺制备了两个系列的镁锰铁氧体，即镁0.9Mn0.1InxFe2-xO4和镁0.9Mn0.1CryFe2-yO4。文中给出了上述系列样品的饱和磁化强度(M_I)、居里温度(T-c)、初始磁导率(u_(I))和磁损耗因子(Tan_6)等磁性能。当铟离子浓度达到一定值后，M-S值略有增大，之后逐渐减小，而在铬样品中，饱和磁化强度则逐渐减小。居里温度随铟和铬浓度的增加而降低。根据交换作用解释了T-c和M-S值的变化。研究发现，与Cr3+离子相比，In3+离子对提高磁体初始磁导率的作用更为显著。在10 kHz-10 MHz的频率范围内，磁损耗因子值在0.15-0.75之间。给出了观察到的Mu(I)和Tandelta随铟和铬浓度增加而变化的解释。(C)2002年，爱思唯尔科学公司出版。
Two series of magnesium-manganese ferrites, viz., Mg0.9Mn0.1InxFe2-xO4 and Mg0.9Mn0.1CryFe2-yO4 have been prepared using conventional ceramic technique. Magnetic properties such as saturation magnetization (M,), Curie temperature (T-c), initial permeability (mu(i)), and magnetic loss factor (tan 6), of the above series of samples are presented in this paper. M-s value increases slightly up to a certain concentration of indium ions thereafter it decreases, while in the case of Cr-samples saturation magnetization decreases steadily. The Curie temperature is observed to fall with increasing concentrations of both indium and chromium. The observed variations in T-c and M-s values are explained on the basis of exchange interactions. It is found that compared with Cr3+ ions, In3+ ions play more significant role in enhancing the initial permeability. The magnetic loss factor values lie in the range of 0.15-0.75 within the frequency range of 10kHz-10MHz. Explanation for the observed variation in mu(i) and tandelta with the increasing concentrations of indium and chromium are given. (C) 2002 Published by Elsevier Science B.V.