The magnetic structure of CsCo2Se2 was investigated using single-crystal neutron diffraction technique. An antiferromagnetic transition with the propagation vector (0,0,1) was observed at TN=78 K. The Co magnetic moment 0.772(6) μB at 10 K pointing in the basal plane couples ferromagnetically in the plane, which stacks antiferromagnetically along the c direction. Tuning and suppressing the interplane antiferromagnetic interaction may be crucial to induce a superconducting state in the material.
Project supported by the National Basic Research Program of China (Grant No. 2012CB921700), the National Natural Science Foundation of China (Grant No. 11190024), the Fundamental Research Funds for the Central Universities, China, and the Research Funds of Renmin University of China (Grant Nos. 17XNLF04 and 17XNLF06). J.S. acknowledges support from China Scholarship Council.
- Juanjuan Liu, Jieming Sheng, Wei Luo, Jinchen Wang, Wei Bao, Jinhu Yang, Minghu Fang, S A Danilkin. A single-crystal neutron diffraction study on magnetic structure of CsCo2Se2[J]. Chin. Phys. B, 2018, 27(11): 117401.