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Chin. Phys., 2004, Vol. 13(6): 918-923    DOI: 10.1088/1009-1963/13/6/023
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

Crystallographic and magnetic structures of Pr6Fe13Ge studied by powder neutron diffraction

Zhang Pan-Lina, Shen Bao-Gena, Yan Qi-Weia, Wang Fang-Weib
a State Key Laboratory of Magnetism, Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China; b 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
Abstract  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.
Keywords:  neutron diffraction      magnetic configuration      Pr_6Fe_{13}Ge  
Received:  20 May 2003      Revised:  30 December 2003      Published:  05 July 2005
PACS:  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)  

Cite this article: 

Zhang Pan-Lin, Shen Bao-Gen, Yan Qi-Wei, Wang Fang-Wei Crystallographic and magnetic structures of Pr6Fe13Ge studied by powder neutron diffraction 2004 Chin. Phys. 13 918

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