Development and Microscopic magnetic characterization of actinide layered compounds

用化学输运法成功地生长了锕系层状化合物ThCuPO和UCuPO单晶。使用这些单晶，晶体结构和化学成分进行了评估。对UCuPO的电阻率、比热和磁化强度的测量表明，UCuPO的强磁各向异性是由铀的局域5f电子引起的，而金属导电性主要是由铜和磷层引起的。作为比较，我们用核磁共振技术研究了CeCoIn_5（超导体）、CePt_2In_7（反铁磁体）等强关联电子系统的微观磁性。

Single crystals of actinide layered compounds ThCuPO and UCuPO have been successfully grown by the chemical transport method. Using these single crystals, the crystal structures and chemical compositions have been evaluated. The measurements of resistivity, specific heat, and magnetization for UCuPO have revealed that the strong magnetic anisotropy causes from the localized 5f electrons of uranium and the metallic conductivity occurs mainly owing to the layers of copper and phosphorus. For comparison, the microscopic magnetism has been investigated in the strongly correlated electron systems CeCoIn_5(superconductor), CePt_2In_7(antiferromagnet), etc. by means of nuclear magnetic resonance technique.