摘要
Magnetic susceptibility,specific heat,and neutron powder diffraction measurements have been performed on polycrystalline Li_(2)Co(WO_4)_(2)samples.Under zero magnetic field,two successive magnetic transitions at T_(N1)~9.4 K and T_(N2)~7.4 K are observed.The magnetic ordering temperatures gradually decrease as the magnetic field increases.Neutron diffraction reveals that Li_(2)Co(WO_4)_(2)enters an incommensurate magnetic state with a temperature dependent k between T_(N1)and T_(N2).The magnetic propagation vector locks-in to a commensurate value k=(1/2,1/4,1/4)below T_(N2).The antiferromagnetic structure is refined at 1.7 K with Co2+magnetic moment 2.8(1),μ_B,consistent with our first-principles calculations.
作者
Xiyu Chen
Ning Ding
Meifeng Liu
Tao Zou
V.Ovidiu Garlea
Jingwen Gong
Fei Liu
Yunlong Xie
Lun Yang
Shuhan Zheng
Xiuzhang Wang
Shuai Dong
TCharlton
Jun-Ming Liu
陈西煜;丁宁;刘美风;邹涛;V.Ovidiu Garlea;龚婧雯;刘飞;谢云龙;杨伦;郑书翰;王秀章;董帅;T.Charlton;刘俊明(Institute for Advanced Materials,Hubei Normal University,Huangshi 435002,China;School of Physics,Southeast University,Nanjing 211189,China;Collaborative Innovation Center of Light Manipulations and Applications,Shangdong Normal University,Jinan 250358,China;Neutron Scattering Division,Oak Ridge National Laboratory,Oak Ridge,Tennessee 37831,USA;Laboratory of Solid State Microstructures and Innovative Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China)
基金
Project supported by the National Natural Science Foundation of China(Grant Nos.11834002,12074111,and 11704109)
the National Key R&D Project of China(Grant No.2016YFA0300101)。
