| Autor: |
Adriano, C., Giles, C., Bittar, E. M., Coelho, L. N., de Bergevin, F., Mazzoli, C., Paolasini, L., Ratcliff, W., Bindel, R., Lynn, J. W., Fisk, Z., Pagliuso, P. G. |
| Rok vydání: |
2009 |
| Předmět: |
|
| Zdroj: |
Physical Review B 81, 245115 (2010) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.81.245115 |
| Popis: |
Low temperature magnetic properties of Cd-doped Ce2MIn8 (M = Rh and Ir) single crystals are investigated. Experiments of temperature dependent magnetic susceptibility, heat capacity and electrical resistivity measurements revealed that Cd-doping enhances the antiferromagnetic (AFM) ordering temperature from TN = 2.8 K (x = 0) to TN = 4.8 K (x = 0.21) for Ce2RhIn8-xCdx and induces long range AFM ordering with TN = 3.8 K (x = 0.21) for Ce2IrIn8-xCdx. Additionally, X-ray and neutron magnetic scattering studies showed that Cd-doped samples present below TN a commensurate antiferromagnetic structure with a propagation vector (1/2,1/2,0). The resolved magnetic structures for both compounds indicate that the Cd-doping tends to rotate the direction of the ordered magnetic moments toward the ab-plane. This result suggests that the Cd-doping affects the Ce3+ ground state single ion anisotropy modifying the crystalline electrical field (CEF) parameters at the Ce3+ site. Indications of CEF evolution induced by Cd-doping were also found in the electrical resistivity measurements. Comparisons between our results and the general effects of Cd-doping on the related compounds CeMIn5 (M = Co, Rh and Ir) confirms the claims that the Cd-doping induced electronic tuning is the main effect favoring AFM ordering in these compounds. |
| Databáze: |
arXiv |
| Externí odkaz: |
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