NMR and μ-SR study on competing Heisenberg chain Cs2Cu2Mo3O12

8th International Conference on Highly Frustrated Magnetism 2016

Goto, T.^1 ; Yagi, A.^1 ; Matsui, K.^1 ; Watanabe, I.^2 ; Sasaki, T.^3 ; Hase, M.^4

Physics Division, Sophia University, Chiyodaku Tokyo

102-8554, Japan^1

RIKEN, 2-1 Hirosawa, Wako, Saitama

351-0198, Japan^2

Institute for Material Science(lMR), Tohoku Univ., Sendai

980-8577, Japan^3

National Institute for Materials Science (NIMS), Tsukuba Ibaraki 305-0047 Japan, Japan^4

关键词: Antiferromagnetics;    Competing interactions;    Finite temperatures;    Heisenberg chains;    Long range magnetic order;    Quasi-one dimensional;    Saturation fields;    Tomonaga Luttinger liquid;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/828/1/012017/pdf
DOI  :  10.1088/1742-6596/828/1/012017

来源: IOP

【 摘 要 】

S = 1/2 quasi one dimensional Heisenberg chain Cs2Cu2Mo3O12has two dominant exchange interactions of the nearest-neig hbouring ferromagnetic J1= -93 K and the second nearest-neighbouring antiferromagnetic J2= +33 K. These competing interactions on the spin chain are expected to bring rich physics, such as frustration or nematic Tomonaga-Luttinger liquid (TL) phase. In order to investigate its ground state at zero and finite fields, we have performed133Cs-NMR experiments under the wide range of magnetic field up to 14 T, and μ-SR at zero field. In low-field region, the existence of long range magnetic order was demonstrated below 2 K. In the higher field region between 7 T and the saturation field Hs= 9.15 T, no evidence for magnetic order was confirmed at finite temperatures.