We investigate the magnetic ground state of Sm3BWO9 with a distorted kagome lattice.A magnetic phase transition is identified at TN=0.75 K from the temperature dependence of specific heat.From 11B nuclear magnetic resonance measurements,an incommensurate magnetic order is shown by the double-horn type spectra under a c-axis magnetic field,and absence of line splitting is observed for field oriented within the ab-plane,indicating the incommensurate modulation of the internal field strictly along c-axis.From the spin dynamics,the critical slowing-down behavior is observed in the temperature dependence of 1/T1 with μ0 H⊥c-axis,which is completely absent in the case with μ0H|| c-axis.Based on the local symmetry of11B sites,we analyze the hyperfine coupling tensors and propose two constraints on the possible magnetic structure.The single ion anisotropy should play an important role in determination of contrasting ground states of Sm3BWO9 and Pr3BWO9.

Kai-Yue Zeng;Fang-Yuan Song;Lang-Sheng Ling;Wei Tong;Shi-Liang Li;Zhao-Ming Tian;Long Ma;Li Pi

Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory,Chinese Academy of Sciences,Hefei 230031,China;Hefei National Research Center for Physical Sciences at the Microscale,University of Science and Technology of China,Hefei 230026,China;School of Physics and Wuhan National High Magnetic Field Center,Huazhong University of Science and Technology,Wuhan 430074,China;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China

中国物理快报（英文版）

[1]Kai-Yue Zeng;Fang-Yuan Song;Lang-Sheng Ling;Wei Tong;Shi-Liang Li;Zhao-Ming Tian;Long Ma;Li Pi-.Incommensurate Magnetic Order in Sm3BWO9 with Distorted Kagome Lattice)[J].中国物理快报（英文版）,2022(10):39-44

Incommensurate,Sm3BWO9,of11B,Pr3BWO9

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