Critical behavior in the layered organic-inorganic hybrid (CH3NH3)2CuCl4
Tina Raoufi1,2, Yinina Ma(马怡妮娜)1,2, Young Sun(孙阳)1,2
1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; 2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
Abstract The critical properties and the nature of the ferromagnetic-paramagnetic phase transition in the 2D organic-inorganic hybrid (CH3NH3)2CuCl4 single crystal have been investigated by dc magnetization in the vicinity of the magnetic transition. Different techniques were used to estimate the critical exponents near the ferromagnetic-paramagnetic phase transition such as modified Arrott plots, the Kouvel-Fisher method, and the scaling hypothesis. Values of β=0.22, γ=0.82, and δ=4.4 were obtained. These critical exponents are in line with their corresponding values confirmed through the scaling hypothesis as well as the Widom scaling relation, supporting their reliability. It is concluded that this 2D hybrid compound possesses strong ferromagnetic intra-layer exchange interaction as well as weak interlayer ferromagnetic coupling that causes a crossover from 2D to 3D long-range interaction.
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51725104) and the Beijing Natural Science Foundation, China (Grant No. Z180009).
Corresponding Authors:
Young Sun
E-mail: youngsun@iphy.ac.cn
Cite this article:
Tina Raoufi, Yinina Ma(马怡妮娜), Young Sun(孙阳) Critical behavior in the layered organic-inorganic hybrid (CH3NH3)2CuCl4 2020 Chin. Phys. B 29 067503
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