A comparative study of magnetic behaviors in TbNi2, TbMn2 and TbNi2Mn

作者：Wang J L^*; Din M F Md; Kennedy S J; Hong F; Campbell S J; Studer A J; Wu G H; Cheng Z X; Dou S X

来源：Journal of Applied Physics, 2014, 115(17): 17E135.

DOI：10.1063/1.4869440

All TbNi2, TbMn2, and TbNi2Mn compounds exhibit the cubic Laves phase with AB(2)-type structure in spite of the fact that the ratio of the Tb to transition-metal components in TbNi2Mn is 1:3. Rietveld refinement indicates that in TbNi2Mn the Mn atoms are distributed on both the A (8a) and B (16d) sites. The values of the lattice constants were measured to be a = 14.348 angstrom (space group F-43 m), 7.618 angstrom, and 7.158 angstrom (space group Fd-3 m) for TbNi2, TbMn2, and TbNi2Mn, respectively. The magnetic transition temperatures T-C were found to be T-C = 38 K and T-C = 148 K for TbNi2 and TbNi2Mn, respectively, while two magnetic phase transitions are detected for TbMn2 at T-1 - 20K and T-2 - 49 K. Clear magnetic history effects in a low magnetic field are observed in TbMn2 and TbNi2Mn. The magnetic entropy changes have been obtained.

• 出版日期2014-5-7
• 单位中国科学院