The effect of La–Zn substitution on the microstructure and magnetic properties of barium ferrites
The effect of La–Zn substitution on the microstructure and magnetic properties of barium ferrites
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DOI：
10.1016/j.msea.2006.11.153
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发表时间：
2007-03
期刊：
影响因子：
6.4
通讯作者：
Z. Hua;S. Z. Li;Zhida Han;Dunhui Wang;Ming-Hui Lu;W. Zhong;B. Gu;Y. Du
中科院分区：
文献类型：
--
作者：
Z. Hua;S. Z. Li;Zhida Han;Dunhui Wang;Ming-Hui Lu;W. Zhong;B. Gu;Y. Du
研究了La-Zn掺杂对溶胶-凝胶法合成的Ba 1 − xLaxFe 11. 6 − xZnxO 19（0≤x≤ 0. 8）铁氧体的微结构和磁性能的影响。当0≤x≤ 0. 6时，样品中主要存在六方晶系的铁素体相，晶格常数a和c随x的增大而单调减小。磁化强度σ随x的变化而增大，在x=0.6时达到最大值，然后减小，而矫顽力Hc、各向异性场HA和居里温度Tc则单调减小。为了获得最大的磁化强度，置换量越大的样品应在越高的温度下退火。文中对实验结果作了定性解释。
The effect of La–Zn substitution on the microstructure and magnetic properties of Ba1−xLaxFe11.6−xZnxO19(0≤x≤0.8) ferrites synthesized by sol–gel method was investigated. When 0≤x≤0.6, there mainly exists hexagonal ferrite phase in the samples, the lattice constants a and c decrease monotonously with the increase of x. The magnetization σ increases with the change of x to the maximum at x=0.6 and then decreases, whereas the coercivity Hc, the anisotropy field HAand Curie temperature Tc decrease monotonously. In order to obtain the maximum magnetization, the sample with more substitution amount should be annealed at more high temperature. The results of the experiment are explained qualitatively in the paper.