Speaker
Level for award<br> (Hons, MSc, <br> PhD)?
MSc
Apply to be<br> consider for a student <br> award (Yes / No)?
Yes
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
No
Main supervisor (name and email)<br>and his / her institution
M.B.Tchoula Tchokonte.Email address:mtchokonte@uwc.ac.za
Department of Physics, University of the Western Cape
Abstract content <br> (Max 300 words)
Magnetic substitution in CePt2Si2 and CeCu5In is reported through x-ray diffraction (XRD), electrical resistivity ρ(T), magnetic susceptility (χ(T)) and magnetization (σ(μ0H))measurements. XRD results indicates a tetragonal CaBe2Ge2-type structure with space group P4/nmm for all compositions of the (Ce1-xDyx)Pt2Si2 system, while for the (Ce1-xTbx)Cu5In system, XRD indicates an orthorhombic CeCu6-type structure with space group Pnma up to 60% Ce substitution. ρ(T) results for both alloys systems indicate evolution from coherent Kondo lattice to incoherent single-ion Kondo behaviour. χ(T) data follow the Curie-Weiss (CW) relation for all investigated compositions at high temperatures, given effective moment values (μeff) which increase gradually from the expected value of 2.54 μB for Ce3+-ion to the expected value of 10.65 μB for Dy3+-ion, in the (Ce1-xDyx)Pt2Si2 system, while for the (Ce1-xTbx)Cu5In system an increase of μeff was observed with an increase in Tb content x. For all two systems, no magnetic transition was observed down to 2K. σ(μ0H) data indicates a linear behaviour up to 1T and followed by a strong curvature above 1T for the two alloy systems
(Ce1-xTbx)Cu5In system an increase of μeff was observed with an increase in Tb content x. For all two systems, no magnetic transition was observed down to 2K. σ(μ0H) data indicates a linear behaviour up to 1T and followed by a strong curvature above 1T for the two alloy systems.