Magnetic properties of CaCu5-type RNi3TSi (R=Gd and Tb, T=Mn, Fe, Co and Cu) compounds

• CaCu5-type RNi3TSi show ferromagnetic ordering (R=Gd, Tb, T=Mn–Co, Cu).
• Curie point increases in ‘RNi3CuSi–RNi3NiSi–RNi3CoSi–RNi3MnSi–RNi3FeSi’ row.
• MCE decreases in ‘RNi3CuSi–RNi3NiSi–RNi3CoSi–RNi3MnSi–RNi3FeSi’ row.
• TbNi3{Mn, Fe, Co}Si exhibit significant magnetic hysteresis.
• The coercive field of TbNi3MnSi and TbNi3FeSi reach 13 kOe and 16 kOe at 5 K.

Magnetic properties and magnetocaloric effect of CaCu5-type RNi3TSi (R=Gd and Tb, T=Mn, Fe, Co and Cu) compounds have been investigated. Magnetic measurements of RNi3TSi display the increasing of Curie temperature and the decreasing of magnetocaloric effect and saturated magnetic moment in the row of ‘RNi3CuSi–RNi3NiSi–RNi3CoSi–RNi3MnSi–RNi3FeSi’. In contrast to GdNi3{Mn, Fe, Co}Si, TbNi3{Mn, Fe, Co}Si exhibit significant magnetic hysteresis. The coercive field increases from TbNi4Si (~0.5 kOe) to TbNi3CoSi (4 kOe), TbNi3MnSi (13 kOe) and TbNi3FeSi (16 kOe) in field of 50 kOe at 5 K, whereas TbNi3CuSi exhibits a negligible coercive field.

Magnetic measurements of RNi3TSi show the increasing of Curie temperature and the decreasing of magnetocaloric effect and saturated magnetic moment in the row of 'RNi3CuSi–RNi3NiSi–RNi3CoSi–RNi3MnSi–RNi3FeSi'. In contrast to GdNi3{Mn, Fe, Co}Si, TbNi3{Mn, Fe, Co}Si exhibit significant magnetic hysteresis. The coercive field increases from TbNi4Si (~0.5 kOe) to TbNi3CoSi (4 kOe), TbNi3MnSi (13 kOe) and TbNi3FeSi (16 kOe) in field of 50 kOe at 5 K, whereas TbNi3CuSi exhibits a negligible coercive field.Figure optionsDownload as PowerPoint slide