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

Authors

Jianli Wang, University of WollongongFollow
M F. Md Din, University of WollongongFollow
Shane Kennedy, ANSTO
F Hong, University of WollongongFollow
Stewart J. Campbell, University of New South WalesFollow
A J. Studer, ANSTO
G H. Wu, Chinese Academy of Sciences
Zhenxiang Cheng, University of WollongongFollow
S X. Dou, University of WollongongFollow

RIS ID

89063

Publication Details

Wang, J. L., Md Din, M. F., Kennedy, S. J., Hong, F., Campbell, S. J., Studer, A. J., Wu, G. H., Cheng, Z. & Dou, S. X. (2014). A comparative study of magnetic behaviors in TbNi2, TbMn2 and TbNi2Mn. Journal of Applied Physics, 115 (7), 17E135-1-17E135-3.

Abstract

All TbNi2, TbMn2, and TbNi2Mn compounds exhibit the cubic Laves phase with AB2-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 Å (space group F-43 m), 7.618 Å, and 7.158 Å (space group Fd-3 m) for TbNi2, TbMn2, and TbNi2Mn, respectively. The magnetic transition temperatures TC were found to be TC = 38 K and TC = 148 K for TbNi2 and TbNi2Mn, respectively, while two magnetic phase transitions are detected for TbMn2 at T1 = 20 K and T2 = 49 K. Clear magnetic history effects in a low magnetic field are observed in TbMn2 and TbNi2Mn. The magnetic entropy changes have been obtained.