Abstract
The structure and magnetic properties of Dy 2AlFe 14Mn 2 compound were investigated by X-ray diffractometry and magnetization measurements. Dy 2AlFe 14Mn 2 compound has a hexagonal Th 2Ni 17-type structure. Zero thermal expansion and negative thermal expansion were found in Dy 2AlFe 14Mn 2 compound in the temperature range from 184 to 264 K, and from 264 to 383 K, respectively, by X-ray dilatometry. The spontaneous magnetostrictive deformations from 104 to 400 K were calculated. The results show that the spontaneous volume magnetostrictive deformation increases firstly with increasing temperature, and then decreases with further increasing temperature.
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