论文标题
MN中的MN跨磁性状态到旋转玻璃行为的跨界
Crossover from meta-magnetic state to spin-glass behaviour upon Ti-substitution for Mn in CuMn2O4
论文作者
论文摘要
通过固态反应法进行了cumn2-xtixo4（x = 0、0.25和0.50）的四方扭曲的尖晶石，然后进行中子衍射，FTIR光谱，介电光谱和磁化测量。中子衍射和FTIR光谱提供了有关相形成的信息。但是，磁敏感性清楚地显示了与元磁性状态相关的76K低于76K的Ferri-Magnetic Order，该状态转向MN在Cumn2O4中的Ti-substitution时转向旋转玻璃行为。此外，所有尖晶石的室温m（h）由阿罗特（Arott）的弱铁磁作绘图描述。此外，室温介电测量提供了以晶界效应为主的Cumn2O4的电子特性，在Cumn2O4中，MN的Ti替代时会显着增加。
Tetragonal distorted spinel of CuMn2-xTixO4 (x = 0, 0.25 and 0.50) was prepared by solid state reaction method followed by neutron diffraction, FTIR spectroscopy, dielectric spectroscopy and magnetization measurements. The neutron diffraction and FTIR spectroscopy provide the information regarding phase formation. But, the magnetic susceptibility clearly shows the ferri-magnetic order below 76K associated with meta-magnetic state which turns to spin-glass behaviour upon Ti-substitution for Mn in CuMn2O4. In addition, the room temperature M(H) of all the spinels are described by the Arrott's plot for weak ferromagnetism. Further, the room temperature dielectric measurement provides the electronic property of CuMn2O4 dominated by grain boundary effect that is significantly increased upon Ti-substitution for Mn in CuMn2O4.
