中国物理B ›› 2004, Vol. 13 ›› Issue (6): 918-923.doi: 10.1088/1009-1963/13/6/023

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Crystallographic and magnetic structures of Pr6Fe13Ge studied by powder neutron diffraction

张泮霖1, 沈保根1, 严启伟1, 王芳卫2   

  1. (1)State Key Laboratory of Magnetism, Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China; (2)State Key Laboratory of Magnetism, Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China; Leon Brillouin Laboratory, CEA/Saclay, 91191 Gif sur Yvette, France
  • 收稿日期:2003-05-20 修回日期:2003-12-30 出版日期:2004-07-05 发布日期:2005-07-05

Crystallographic and magnetic structures of Pr6Fe13Ge studied by powder neutron diffraction

Wang Fang-Wei (王芳卫)ab, Zhang Pan-Lin (张泮霖)a, Shen Bao-Gen (沈保根)a, Yan Qi-Wei (严启伟)a   

  1. a State Key Laboratory of Magnetism, Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China; b Leon Brillouin Laboratory, CEA/Saclay, 91191 Gif sur Yvette, France
  • Received:2003-05-20 Revised:2003-12-30 Online:2004-07-05 Published:2005-07-05

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摘要： Crystallographic and magnetic structures of Pr_6Fe_{13}Ge have been investigated by high-resolution powder neutron diffraction in the temperature range of 10－300 K. The magnetic structure consists of ferromagnetic Pr_6Fe_{13} slabs that alternate antiferromagnetically, along c, with the next Pr_6Fe_{13} slab separated by a non-magnetic Ge layer. The magnetic moments lie within the ab-planes. The propagation vector of this structure is k=(001) with respect to the conventional reciprocal lattice of the I-centred structure. However, the temperature-dependence of neutron-scattering intensity of the (110) Bragg peak, very similar to the temperature-dependent magnetization measured by SQUID magnetometer, indicates that a small c-axis ferromagnetic component should be added to the above antiferromagnetic model.

关键词: neutron diffraction, magnetic configuration, Pr_6Fe_{13}Ge

Abstract: Crystallographic and magnetic structures of Pr$_6$Fe$_{13}$Ge have been investigated by high-resolution powder neutron diffraction in the temperature range of 10－300 K. The magnetic structure consists of ferromagnetic Pr$_6$Fe$_{13}$ slabs that alternate antiferromagnetically, along c, with the next Pr$_6$Fe$_{13}$ slab separated by a non-magnetic Ge layer. The magnetic moments lie within the ab-planes. The propagation vector of this structure is k=(001) with respect to the conventional reciprocal lattice of the I-centred structure. However, the temperature-dependence of neutron-scattering intensity of the (110) Bragg peak, very similar to the temperature-dependent magnetization measured by SQUID magnetometer, indicates that a small c-axis ferromagnetic component should be added to the above antiferromagnetic model.

Key words: neutron diffraction, magnetic configuration, Pr$_6$Fe$_{13}$Ge

中图分类号: 

  • 75.25.+z
61.50.Ks (Crystallographic aspects of phase transformations; pressure effects) 75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 07.55.Jg (Magnetometers for susceptibility, magnetic moment, and magnetization measurements) 75.30.Cr (Saturation moments and magnetic susceptibilities) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)