论文标题
DY在正骨Dyfeo3的磁性中的作用
Role of Dy on the magnetic properties of orthorhombic DyFeO3
论文作者
论文摘要
矫正岩是一类磁性材料，磁性排序温度高于600 K，主要的G型抗铁磁体剂量为Fe-Spin系统的抗铁磁有序，具体取决于稀有地球离子，在较低温度下，FE旋转的旋转重新定向。 Dyfeo3特别感兴趣，因为自旋的重新定向被分类为莫林过渡，其过渡温度取决于染色-FE的相互作用。 Here, we report a detailed study of the magnetic and structural properties of microcrystalline DyFeO3 powder and bulk single crystal using neutron diffraction and magnetometry between 1.5 and 450 K. We find that, while the magnetic properties of the single crystal are largely as expected, the powder shows strongly modified magnetic properties, including a modified spin reorientation and a smaller Dy-Fe interaction energy of the order of 10 μeV.粉末和单晶之间的细微结构差异表明它们属于不同的磁性空间群。另外，粉末中2 K处的DY排序不一致，调制载体为0.0173（5）C*，对应于〜58个单位细胞的周期性。
Orthoferrites are a class of magnetic materials with a magnetic ordering temperature above 600 K, predominant G-type antiferromagnetic ordering of the Fe-spin system and, depending on the rare-earth ion, a spin reorientation of the Fe spin taking place at lower temperatures. DyFeO3 is of particular interest since the spin reorientation is classified as a Morin transition with the transition temperature depending strongly on the Dy-Fe interaction. Here, we report a detailed study of the magnetic and structural properties of microcrystalline DyFeO3 powder and bulk single crystal using neutron diffraction and magnetometry between 1.5 and 450 K. We find that, while the magnetic properties of the single crystal are largely as expected, the powder shows strongly modified magnetic properties, including a modified spin reorientation and a smaller Dy-Fe interaction energy of the order of 10 μeV. Subtle structural differences between powder and single crystal show that they belong to distinct magnetic space groups. In addition, the Dy ordering at 2 K in the powder is incommensurate, with a modulation vector of 0.0173(5) c*, corresponding to a periodicity of ~58 unit cells.
