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Chin. Phys. B, 2020, Vol. 29(6): 067503    DOI: 10.1088/1674-1056/ab892c
Special Issue: Virtual Special Topic — Magnetism and Magnetic Materials
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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.
Keywords:  critical behavior      critical exponent      organic-inorganic hybrid  
Received:  13 March 2020      Revised:  09 April 2020      Published:  05 June 2020
PACS:  75.40.Cx (Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.))  
  75.50.-y (Studies of specific magnetic materials)  
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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