1. Incommensurate-commensurate magnetic phase transition in the double tungstate Li2Co(WO4)2
- Author
-
Chen, Xiyu, Ding, Ning, Liu, Meifeng, Zou, Tao, Garlea, V. Ovidiu, Gong, Jingwen, Liu, Fei, Xie, Yunlong, Yang, Lun, Zheng, Shuhan, Wang, Xiuzhang, Dong, Shuai, Charlton, T., and Liu, Jun-Ming
- Subjects
Condensed Matter - Materials Science ,Condensed Matter - Strongly Correlated Electrons - Abstract
Magnetic susceptibility, specific heat, and neutron powder diffraction measurements have been performed on polycrystalline Li2Co(WO4)2 samples. Under zero magnetic field, two successive magnetic transitions at TN1 ~ 9.4 K and TN2 ~ 7.4 K are observed. The magnetic ordering temperatures gradually decrease as the magnetic field increases. Neutron diffraction reveals that Li2Co(WO4)2 enters an incommensurate magnetic state with a temperature dependent k between TN1 and TN2. The magnetic propagation vector locks-in to a commensurate value k = (1/2, 1/4, 1/4) below TN2. The antiferromagnetic structure is refined at 1.7 K with Co2+ magnetic moment 2.8(1) uB, consistent with our first-principles calculations.
- Published
- 2021
- Full Text
- View/download PDF