Magnetic properties of S= 1/2 J1-J2 one-dimensional magnets, VO(XO4)(2,2'-bpy) (X=S, Mo; bpy = bipyridine)

27th International Conference on Low Temperature Physics

Kikuchi, H.^1 ; Ishikawa, Y.^1 ; Fujii, Y.^2 ; Matsuo, A.^3 ; Kindo, K.^3

Department of Applied Physics, University of Fukui, Fukui

910-8507, Japan^1

Research Center for Development of Far-Infrared Region, University of Fukui, Fukui

910-8507, Japan^2

Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa

277-8581, Japan^3

关键词: Bipyridines;    Heisenberg antiferromagnets;    High-field magnetization;    One-dimensional magnets;    Spin chain compounds;    Spin gap;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/568/4/042017/pdf
DOI  :  10.1088/1742-6596/568/4/042017

来源: IOP

【 摘 要 】

Magnetic susceptibility, high field magnetization and specific heat of S 1/2 J1-J2spin chain compounds VO(XO4)(2,2'-bpy) (X=S, Mo; bpy bipyridine) are measured. VO(SO4)(2,2'-bpy) is found to be a one-dimensional Heisenberg antiferromagnet with J1/kB6.5 K and J2=0. A ratio j J2/J1of VO(MoO4)(2,2'-bpy) is estimated to be about 0.2 with J1/kB51 K. Spin gap is not observed in both the compounds, which is consistent with the theoretical prediction.