Incommensurate–commensurate magnetic phase transition in double tungstate Li2Co(WO4)2

Magnetic susceptibility,specific heat,and neutron powder diffraction measurements have been performed on poly-crystalline 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...

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Bibliographic Details
Published in:Chinese physics B 2022-03, Vol.31 (4), p.67-72
Main Authors: 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., Liu, Jun-Ming
Format: Article
Language:English
Subjects:
Co(WO
incommensurate-commensurate magnetic transition
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Summary:Magnetic susceptibility,specific heat,and neutron powder diffraction measurements have been performed on poly-crystalline 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)μB,consistent with our first-principles calculations.
ISSN:1674-1056
DOI:10.1088/1674-1056/ac3818