Synthesis, Crystal Structure, and Magnetic Properties of MnFe3O5
Synthesis, Crystal Structure, and Magnetic Properties of MnFe3O5
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DOI：
10.1002/zaac.201600365
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发表时间：
2016-12-01
影响因子：
1.4
通讯作者：
Attfield, J. Paul
中科院分区：
文献类型：
--
作者：
Hong, Ka H.;McNally, Graham M.;Attfield, J. Paul
MnFe3O5在10GPa的压力下在1400 ℃下合成。MnFe3O5具有正交晶系结构（空间群Cmcm，在300 K下a = 2.9137（1），B = 9.8565（7）和c = 12.6143（6）埃），并且与Fe4O5是同构的。磁性测量显示在350 K的反铁磁转变和广泛的居里转变在150 K，类似的自旋有序温度的Fe4O5。变温同步辐射X射线衍射表明，该结构在低于350 K时发生各向异性热膨胀，但在晶体结构中没有观察到长程电荷有序。
MnFe3O5 was synthesized under a pressure of 10 GPa at 1400 degrees C. MnFe3O5 has an orthorhombic structure (space group Cmcm, a = 2.9137(1), b = 9.8565(7) and c = 12.6143(6) angstrom at 300 K) and is isostructural with Fe4O5. Magnetic measurements reveal an antiferromagnetic transition at 350 K and a broad Curie transition at 150 K, similar to the spin ordering temperatures of Fe4O5. Variable temperature synchrotron X-ray diffraction shows that the structure undergoes anisotropic thermal expansion below 350 K, but no long range charge ordering is observed in the crystal structure.