کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1801224 | 1024563 | 2010 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Structural and magnetic properties in Bi1−xRxFeO3 (x=0–1, R=La, Nd, Sm, Eu and Tb) polycrystalline ceramics Structural and magnetic properties in Bi1−xRxFeO3 (x=0–1, R=La, Nd, Sm, Eu and Tb) polycrystalline ceramics](/preview/png/1801224.png)
A series of rare-earth doped BiFeO3 samples, Bi1−xRxFeO3 (x=0–1, R=La, Nd, Sm, Eu and Tb), were prepared in this work. X-ray diffraction analysis showed that the structure of rare-earth doped BiFeO3 was transformed from rhombohedral lattice to orthorhombic one by increasing x. The lattice constants and unit-cell volume decreased with the increasing of the doping content, while both the Néel temperature and magnetization were enhanced. A magnetic phase transition was observed at about 35 K for BiFeO3. The variation of the magnetization with temperature depended on applied field strength and magnetizing history, which was explained according to the antiferromagnetic exchange interaction between Fe and R sites in Bi1−xRxFeO3(x>0). The magnetocrystalline anisotropy contributed by Fe sublattice gave rise to a large coercivity in BixNd1−xFeO3 with an orthorhombic structure.
Journal: Journal of Magnetism and Magnetic Materials - Volume 322, Issue 15, August 2010, Pages 2251–2255