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Chinese Physics, 2004, Vol. 13(10): 1652-1656    DOI: 10.1088/1009-1963/13/10/013
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A Mössbauer study of the magnetic coupling in iron phosphorous trisulfides

Dai Yao-Dong (戴耀东)a, Wang Lin (王林)b, Yang Ya-Xin (杨亚新)c, He Yun (何云)c, Huang Hong-Bo (黄红波)c, Xia Yuan-Fu (夏元复)c 
a College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; b Department of Physics, Xinyang Normal University, Xinyang 464000, China; c Department of Physics, Nanjing University, Nanjing 210093, China
Abstract  The polycrystalline sample of layered compound FePS$_3$ has been investigated by using Mössbauer spectroscopy (12K to 300K), magnetic susceptibility measurements, x-ray diffraction and FTIR spectroscopy. The antiferromagnetic order exists below $T_{\rm N}$=120.5±1K. The Mössbauer spectra below $T_{\rm N}$ indicate that the magnetization axis is perpendicular to the layer of FePS$_3$, and the divalent iron cations are in their high spin configurations. By fitting the hyperfine field parameters near the Néel temperature, we obtain information on the nature of magnetic interactions in the material. The results show that the magnetic coupling can be treated by the two-dimensional Ising model, and it can be interpreted on the basis of a crystal-field effect.
Keywords:  layered compound      Mössbauer spectroscopy      magnetic coupling      Ising model  
Received:  11 March 2004      Revised:  25 May 2004      Accepted manuscript online: 
PACS:  76.80.+y (M?ssbauer effect; other γ-ray spectroscopy)  
  75.30.Cr (Saturation moments and magnetic susceptibilities)  
  61.10.Nz  
  78.30.Hv (Other nonmetallic inorganics)  
  75.50.Ee (Antiferromagnetics)  
  75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)  
  75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))  
  75.10.Hk (Classical spin models)  
  75.40.-s (Critical-point effects, specific heats, short-range order)  
  75.10.Dg (Crystal-field theory and spin Hamiltonians)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No G19835050).

Cite this article: 

Dai Yao-Dong (戴耀东), Wang Lin (王林), Yang Ya-Xin (杨亚新), He Yun (何云), Huang Hong-Bo (黄红波), Xia Yuan-Fu (夏元复) A Mössbauer study of the magnetic coupling in iron phosphorous trisulfides 2004 Chinese Physics 13 1652

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