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Chin. Phys. B, 2009, Vol. 18(11): 5055-5060    DOI: 10.1088/1674-1056/18/11/074
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Structures and magnetic anisotropy of $\beta$-Mn2V2O7 crystals synthesized by the molten salt method

Zhou Chuan-Cang(周传仓),Liu Fa-Min(刘发民), and Ding Peng(丁芃)
Department of Physics, School of Physics and Nuclear Energy Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
Abstract  $\beta$-Mn2V2O_7 crystals with strip shape are successfully prepared by the molten salt method in a closed crucible, and are characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area of electron diffraction (SAED) and high-resolution transmission electron microscopy (HRTEM). The results indicate that the sample is of the $\beta$-Mn2V2O7 crystal with monoclinic symmetry, level natural cleavage facets and directional growth. Magnetic properties are measured by vibration sample magnetometry (VSM) at room temperature, and the magnetic hysteresis loop indicates that the $\beta$-Mn2V2O7 has anti-ferromagnetic properties with low coercive force and remnant magnetization. The magnetic measurement results in different directions exhibit that the $\beta$-Mn2V2O7 has magnetic anisotropy, which is due to the fact that the magnetic interaction energy of the $\beta$-Mn2V2O7 is lowest only when the electron configuration is in a certain direction.
Keywords:  $\beta$-Mn2V2O7      molten salt synthesis      magnetic anisotropy  
Received:  22 February 2009      Revised:  22 May 2009      Accepted manuscript online: 
PACS:  75.30.Gw (Magnetic anisotropy)  
  61.66.Fn (Inorganic compounds)  
  81.20.-n (Methods of materials synthesis and materials processing)  
  61.50.Ah (Theory of crystal structure, crystal symmetry; calculations and modeling)  
  75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)  
  75.50.Ee (Antiferromagnetics)  

Cite this article: 

Zhou Chuan-Cang(周传仓),Liu Fa-Min(刘发民), and Ding Peng(丁芃) Structures and magnetic anisotropy of $\beta$-Mn2V2O7 crystals synthesized by the molten salt method 2009 Chin. Phys. B 18 5055

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