中国物理B ›› 2010, Vol. 19 ›› Issue (6): 67503-067503.doi: 10.1088/1674-1056/19/6/067503

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Synthesis, structure and antiferromagnetic behaviour of brannerite MnV2O6

周传仓, 刘发民, 丁芃, 蔡鲁刚, 钟文武, 张嬛   

  1. School of Physics and Nuclear Energy Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • 收稿日期:2009-10-29 出版日期:2010-06-15 发布日期:2010-06-15

Synthesis, structure and antiferromagnetic behaviour of brannerite MnV2O6

Zhou Chuan-Cang(周传仓), Liu Fa-Min(刘发民), Ding Peng(丁芃), Cai Lu-Gang(蔡鲁刚), Zhong Wen-Wu(钟文武), and Zhang Huan(张嬛)   

  1. School of Physics and Nuclear Energy Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2009-10-29 Online:2010-06-15 Published:2010-06-15

摘要: Brannerite MnV2O_{6 } with plate-like shape is successfully synthesized by hydrothermal method. Its crystal structure and morphology are investigated by x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), high resolution transmission electron microscopy (HRTEM) and select area electronic diffraction (SAED). The results show that the brannerite MnV2O6 with monoclinic structure has a uniform plate-like shape with a diameter of about 5--8~\mu m and a thickness of about 500~nm. SAED patterns further confirm the structure of the brannerite MnV2O6 and the single crystalline character of the plate crystal. Magnetic properties are measured by superconducting quantum interference device (SQUID) in a temperature range of 2--300~K under a magnetic field of 1~T. The magnetic measurement results indicate that the material undergoes an antiferromagnetic transition with a N\'{e}el temperature of 17~K. Above 50~K, the inverse susceptibility is fitted well to the Curie--Weiss law with a calculated moment of 5.98~\mu_{\rm B}. Finally, the origin of antiferromagnetic behaviour in the brannerite MnV2O6 is explained by means of Anderson model.

Abstract: Brannerite MnV2O6 with plate-like shape is successfully synthesized by hydrothermal method. Its crystal structure and morphology are investigated by x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), high resolution transmission electron microscopy (HRTEM) and select area electronic diffraction (SAED). The results show that the brannerite MnV2O6 with monoclinic structure has a uniform plate-like shape with a diameter of about 5--8 $\mu$m and a thickness of about 500 nm. SAED patterns further confirm the structure of the brannerite MnV2O6 and the single crystalline character of the plate crystal. Magnetic properties are measured by superconducting quantum interference device (SQUID) in a temperature range of 2--300 K under a magnetic field of 1 T. The magnetic measurement results indicate that the material undergoes an antiferromagnetic transition with a Néel temperature of 17 K. Above 50 K, the inverse susceptibility is fitted well to the Curie--Weiss law with a calculated moment of 5.98 $\mu_{\rm B}$. Finally, the origin of antiferromagnetic behaviour in the brannerite MnV2O6 is explained by means of Anderson model.

Key words: brannerite MnV2O6, hydrothermal synthesis, antiferromagnetic behaviour

中图分类号:  (Growth from solutions)

  • 81.10.Dn
75.50.Ee (Antiferromagnetics) 61.66.Fn (Inorganic compounds) 75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 75.30.Cr (Saturation moments and magnetic susceptibilities) 85.25.Dq (Superconducting quantum interference devices (SQUIDs))