期刊
IEEE TRANSACTIONS ON MAGNETICS
卷 52, 期 7, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMAG.2016.2517091
关键词
Frustration; low-dimensional systems; magnetic; quantum spin
资金
- Grants-in-Aid for Scientific Research [15K05149] Funding Source: KAKEN
We have measured the magnetic and thermal properties below 2 K of a quasi-1-D frustrated spin-1/2 system Cs2Cu2Mo3O12 called CuO2 ribbon chain systems in order to investigate its magnetic ground state. In the temperature dependence of the specific heat divided by temperature, C/T-T, we found a sharp peak structure at T-N = 1.85 K, which indicates the existence of a phase transition. Considering the behavior of the magnetization and specific heat, it is found that Cs2Cu2Mo3O12 exhibits an antiferromagnetic transition at TN = 1.85 K, and its magnetic ground state is an antiferromagnetic long-range ordered one. The determined ground state of Cs2Cu2Mo3O12 significantly contrasts with a nonmagnetic ground state of isostructural compound Rb2Cu2Mo3O12. We discuss the origins of difference of the magnetic ground states between Rb2Cu2Mo3O12 and Cs2Cu2Mo3O12.
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