12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone

Electrical Resistivity and magnetic properties of (Ce1xTbx) Pt2Si2 (0  x  1)

13 Jul 2011, 17:00


Poster Presentation Track A - Condensed Matter Physics and Material Science Poster1


Mr zwelithini Mahlubi (University of the western cape)


Measurements of X-rays diffraction (XRD), electrical resistivity (T), magnetic susceptibility (T), and magnetization (µ0H) are repeated for the pseudo-ternary alloy (Ce1xTbx) Pt2Si2. XRD results for all the compositions of (Ce1xTbx) Pt2Si2 system indicate a tetragonal CaBe2Ge2-type structure. (T) results indicate evolution from coherent Kondo lattice to incoherent single ion Kondo scattering with increase in Tb content up to x=0.8, and followed by a metallic behavior above x = 0.8. (T) data at high temperatures follow the Currie-Weiss relation for all alloy compositions and give effective moment value µeff which increases gradually from value of 2.54 µB for Ce3+- ion to the expected values of 9.72 µB for Tb3+ -ion. The alloys compositions in the concentration range of 0.7  x 1 exhibit antiferromagnetism and the low temperature (T) data were used to find the Neel temperature TN as a function of x. (µ0H) data are presented for all investigated compositions.

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)? No
Level (Hons, MSc, <br> &nbsp; PhD, other)? MSc
Consider for a student <br> &nbsp; award (Yes / No)? Yes

Primary author

Mr zwelithini Mahlubi (University of the western cape)


Prof. Dariuzs Kaczorowski (4) Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PO Box 1410, 50-950 Wroclaw, Poland.) Prof. Moise Bertin Tchoula Tchokonte (1) Department of Physics, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa.) Prof. Paul de Villiers du Plessis (2) Department of Physics, University of Johannesburg, P.O.Box 524, Auckland Pack 2006, South Africa.) Prof. Terry Doyle (5) Material Research Group, iThemba LABS, PO Box 722, Somerset West 7129, South Africa.)

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