Abstract
Investigations made by powder X-ray diffraction, susceptibility measurements and neutron diffraction experiments on the ternary silicide TbMnSi are reported. This compound crystallizes in the tetragonal structure of the CeFeSi-type (space group, P4/nmm). It exhibits a ferrimagnetic behaviour below Tc = 260 K. The magnetization value and the coercive field are 2.7 μB and 6 kOe, respectively, at 4.2 K. Neutron diffraction study confirms that both Mn and Tb sublattices order simultaneously at 260 K. The magnetic structure consists of Mn and Tb ferromagnetic (001) layers coupled antiferromagnetically (μMn = 2.2 μB and μTb = 8.45 μB at 2 K). The occurrence of a ferromagnetic Mn(001) layer in this CeFeSi-type structure compound is discussed.
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