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A comparative study of magnetic behaviors in TbNi2, TbMn2 and TbNi2Mn
- Source :
- Journal of Applied Physics. 115:17E135
- Publication Year :
- 2014
- Publisher :
- AIP Publishing, 2014.
-
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 A (space group F-43 m), 7.618 A, and 7.158 A (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.
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 115
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi...........a8677e516ed47ef40de5cc7bdadada28