Influence of manganese on the structure and magnetic properties of YFeO3 nanocrystal
Influence of manganese on the structure and magnetic properties of YFeO3 nanocrystal
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锰对YFeO3纳米晶结构和磁性能的影响
DOI：
10.1016/j.ceramint.2011.09.030
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发表时间：
2012-03
影响因子：
5.2
通讯作者：
Jiang, Guojian
中科院分区：
文献类型：
--
作者：
Shen, Hui;Xu, Jiayue;Jin, Min;Jiang, Guojian
以柠檬酸为燃料，采用溶胶-凝胶燃烧法制备了高纯度Mn掺杂YFeO 3纳米晶。系统研究了掺杂对材料结构和磁性的影响。X射线衍射和透射电镜结果表明，样品结晶良好。在800°C下煅烧可以得到正交相的YFeO 3微晶。当x≤0.2时，YFe_（1-x）Mn_xO_3体系中存在六方结构的亚稳相，要得到纯的正交相，必须提高焙烧温度。还观察到晶体结构的扭曲，晶格参数的变化。反铁磁耦合有效地加强与Mn含量的增加。这可能是由于Fe ~（3+）-Fe ~（3+）和Fe ~（3+）-Mn ~（3+）之间的反铁磁超交换作用增强而引起的结构畸变所致。
High purity Mn doped YFeO3nanocrystals were readily prepared by sol–gel combustion method, with citric acid as the fuel. The doping effect on the structure and magnetic properties was systematically studied. X-ray diffraction and TEM results indicate that the samples are well crystallized. Orthorhombic YFeO3crystallites can be obtained when calcined at 800°C. In YFe1−xMnxO3system for x≤0.2, hexagonal structure exists as metastable phase and the calcined temperature has to be elevated to obtain pure orthorhombic phase. Distortion of the crystal structure was also observed, with changes in lattice parameters. The antiferromagnetic coupling was effectively strengthened with increased Mn content. This is possibly originated from the structural distortion which gives rise to enhanced antiferromagnetic superexchange interaction between Fe3+–Fe3+and Fe3+–Mn3+.
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