中国物理B ›› 2004, Vol. 13 ›› Issue (6): 918-923.doi: 10.1088/1009-1963/13/6/023
张泮霖1, 沈保根1, 严启伟1, 王芳卫2
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
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.
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