12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone
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Critical behaviour near magnetic phase transition in CeCuGe

Presented by Ms. Buyi SONDEZI-MHLUNGU on 13 Jul 2011 from 17:00 to 19:00
Type: Poster Presentation
Session: Poster1
Track: Track A - Condensed Matter Physics and Material Science


<p>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.

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Room: Asteria

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