论文标题
磁场诱导尖晶石Geni2O4中的相变
Magnetic Field Induced Phase Transition in Spinel GeNi2O4
论文作者
论文摘要
Cutic Spieni2O4具有两个连续的抗磁相变（TN1 12.1和TN2 11.4 K），具有有趣的磁性特性，并且没有任何结构过渡。我们在不同的晶体学方向上进行了详细的热容量和磁性测量。沿[111]方向存在磁场（H> 4 T）的新磁相，在沿[100]和[110]方向应用磁场时未观察到这一点。高场中子粉末衍射测量结果证实了磁相发生的这种变化，这可以归因于存在磁场的自旋重新定向。强烈的磁各向异性和竞争磁相互作用在该立方系统的复杂磁性行为上起着至关重要的作用。
Cubic spinel GeNi2O4 exhibits intriguing magnetic properties with two successive antiferromagnetic phase transitions (TN1 12.1 and TN2 11.4 K) with the absence of any structural transition. We have performed detailed heat capacity and magnetic measurements in different crystallographic orientations. A new magnetic phase in presence of magnetic field (H > 4 T) along the [111] direction is revealed, which is not observed when the magnetic field is applied along the [100] and [110] directions. High field neutron powder diffraction measurements confirm such a change in magnetic phase, which could be ascribed to a spin reorientation in the presence of magnetic field. A strong magnetic anisotropy and competing magnetic interactions play a crucial role on the complex magnetic behavior in this cubic system.
