Cd-doping effects in Ce2MIn8 (M=Rh and Ir) Heavy Fermion Compounds

Published

June 15, 2010

Author(s)

C. Adriano, C. Giles, E. M. Bittar, L. N. Coelho, F. de Bergevin, C. Mazzoli, L. Paolasini, William Ratcliff, Richard Bindel, Jeffrey Lynn, Z. Fisk, P. G. Pagliuso

Abstract

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 Ce₂RhIn_8-xCd_x and induces long range AFM ordering with TN = 3.8 K (x = 0.21) for Ce₂IrIn_8-xCd_x. Additionally, X-ray and neutron magnetic scattering studies showed that Cd-doped samples present below TN a commensurate antiferromagnetic structure with a propagation vector epilson with an right arrow directly over the symbol} = 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.

Citation

Physical Review B

Volume

81

Issue

24

Pub Type

Journals

Download Paper

https://doi.org/10.1103/PhysRevB.81.245115

Local Download

Keywords

Neutron scattering, heavy fermion, single crystal, magnetic susceptibility, heat capacity, resistivity, magnetic order, Neel Temperature

Citation

Adriano, C. , Giles, C. , Bittar, E. , Coelho, L. , de Bergevin, F. , Mazzoli, C. , Paolasini, L. , Ratcliff, W. , Bindel, R. , Lynn, J. , Fisk, Z. and Pagliuso, P. (2010), Cd-doping effects in Ce₂MIn₈ (M=Rh and Ir) Heavy Fermion Compounds, Physical Review B, [online], https://doi.org/10.1103/PhysRevB.81.245115, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=904815 (Accessed October 12, 2025)