论文标题
调整沿Cecubi $ _ {2-x} $ sb $ _ {x} $系列的结晶电场和磁各向异性
Tuning the crystalline electric field and magnetic anisotropy along the CeCuBi$_{2-x}$Sb$_{x}$ series
论文作者
论文摘要
我们进行了X射线粉末衍射，磁化，电阻率，热容量和非弹性中子散射（INS），以研究金属间化合物Cecubi $ _ {2-X} $ SB $ _ {x} $的物理特性。这些化合物在四方结构中与空间群$ p4/nmm $结晶，并存在抗磁性过渡温度，范围从3.6 k到16 k。值得注意的是，磁化易于轴沿该系列变化，这与四方晶体电场（CEF）参数的变化密切相关。使用平均野外模型分析了这种进化，其中包括各向异性最近的邻居相互作用和四方CEF Hamiltonian。通过将磁化率数据与INS测量给出的约束拟合，获得了CEF参数。最后，我们讨论了这种CEF进化如何影响近代物理学以及在这个家庭中寻找超导状态。
We have performed X-ray powder diffraction, magnetization, electrical resistivity, heat capacity and inelastic neutron scattering (INS) to investigate the physical properties of the intermetallic series of compounds CeCuBi$_{2-x}$Sb$_{x}$. These compounds crystallize in a tetragonal structure with space group $P4/nmm$ and present antiferromagnetic transition temperatures ranging from 3.6 K to 16 K. Remarkably, the magnetization easy axis changes along the series, which is closely related to the variations of the tetragonal crystalline electric field (CEF) parameters. This evolution was analyzed using a mean field model, which included anisotropic nearest-neighbor interactions and the tetragonal CEF Hamiltonian. The CEF parameters were obtained by fitting the magnetic susceptibility data with the constraints given by the INS measurements. Finally, we discuss how this CEF evolution can affect the Kondo physics and the search for a superconducting state in this family.
