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
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
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.
Received: 20 May 2003
Revised: 30 December 2003
Accepted manuscript online:
(Magnetization curves, hysteresis, Barkhausen and related effects)
Cite this article:
Wang Fang-Wei (王芳卫), Zhang Pan-Lin (张泮霖), Shen Bao-Gen (沈保根), Yan Qi-Wei (严启伟) Crystallographic and magnetic structures of Pr6Fe13Ge studied by powder neutron diffraction 2004 Chinese Physics 13 918
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