摘要
The structure and magnetic properties of rare-earth ions Tm^(3+)Kagomé lattice Tm_(3)Sb_(3)Mg_(2)O_(14)are studied by x-ray diffraction,magnetic susceptibility and muon spin relaxation(𝜇SR)experiments.The existence of a small amount of Tm/Mg site-mixing disorder is revealed.DC magnetic susceptibility measurement shows that Tm^(3+)magnetic moments are antiferromagnetically correlated with a negative Curie-Weiss temperature of−26.3 K.Neither long-range magnetic order nor spin-glass transition is observed by DC and AC magnetic susceptibility,and confirmed by μSR experiment down to 0.1 K.However,the emergence of short-range magnetic order is indicated by the zero-field μSR experiments,and the absence of spin dynamics at low temperatures is evidenced by the longitudinal-field μSR technique.Compared with the results of Tm_(3)Sb_(3)Zn_(2)O_(14),another Tm-based Kagomé lattice with much more site-mixing disorder,the gapless spin liquid like behaviors in Tm_(3)Sb_(3)Zn_(2)O_(14)can be induced by disorder effect.Samples with perfect geometrical frustration are in urgent demand to establish whether QSL exists in this kind of materials with rare-earth Kagomé lattice.
作者
Yanxing Yang
Kaiwen Chen
Zhaofeng Ding
Adrian D.Hillier
Lei Shu
杨燕兴;陈锴文;丁兆峰;Adrian D.Hillier;殳蕾(State Key Laboratory of Surface Physics,Department of Physics,Fudan University,Shanghai 200438,China;ISIS Facility,STFC Rutherford Appleton Laboratory,Chilton,Didcot,Oxfordshire,OX110QX,United Kingdom;Collaborative Innovation Center of Advanced Microstructures,Nanjing 210093,China;Shanghai Research Center for Quantum Sciences,Shanghai 201315,China)
基金
the ISIS cryogenics Group for their valuable help during the μSR experiments (10.5286/ISIS.E.RB1820271)
supported by the National Natural Science Foundation of China (Grant Nos.12034004 and 12174065)
the Shanghai Municipal Science and Technology (Major Project Grant Nos.2019SHZDZX01 and 20ZR1405300)
