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

Critical behaviour near magnetic phase transition in CeCuGe

13 Jul 2011, 17:00


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


Ms Buyi Sondezi-Mhlungu (University of Johannesburg)


CeCuGe is one of the few compounds to order ferromagnetically at low temperatures. The compound has been observed to exhibit paramagnetic-ferromagnetic (PM-FM) magnetic transition, TC = 10 K This magnetic ordering has been observed from specific heat (Cp), magnetization, (M(T,B)) and resistivity data. Isothermal magnetization of a hexagonal, highly ordered CeCuGe were measured in order to study the critical scaling behavior in the vicinity of magnetic ordering in this polycrystalline compound. From the analyses of the magnetization data, TC was confirmed using modified Arrott plot technique. It was also observed from the critical exponents, beta, gamma and sigma corresponding to the spontaneous magnetization, initial susceptibility and isothermal magnetization were obtained, respectively. The resulting critical exponents obtained reveals that the system falls within Heisenberg and 3-D Ising model.

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

Primary author

Ms Buyi Sondezi-Mhlungu (University of Johannesburg)


Prof. Andre Strydom (University of Johannesburg)

Presentation Materials