Speaker
Ms
Sindisiwe Xhakaza
(Highly Correlated Matter Research Group, Department of Physics, University of Johannesburg, South Africa)
Description
Polycrystalline samples of Sm3Rh4Ge13 compound was synthesized by arc melting the stoichometric quntities of respective purity elements. The compounds crystallize in the usual cubic structure, space group Pm ̅3n (#223) [1-2]. Our magnetic susceptibility measurements show antiferomagnetic behavour at low temperatures, at TN = 5 K, for Sm3Rh4Ge13. The high temperature data of the inverse magnetic susceptibility deviates from Curie-Weiss behaviour, and rather obey modified Curie-Weiss law. This work will focus on thermoelectric properties of the system where, our electrical resistivity data depict a semiconducting nature by virtue of a systematic negative coefficient of temperature dependance and overall values of resistivity that are not within the normal-metal range. The measured thermal transport properties values of Sm3Rh4Ge13 exhibit low thermal conductivity and fairly high and positive thermopower suggesting that the fermi surface in these materials is hole dominated.
Summary
Reference:
[1] J. L. Hodeau, J. Chenavas, M. Marezio, J. P. Remeika, Solid State Commun. 36 (1980) 839–845.
[2] R. Gumeniuk et al. Dalton Trans. 41 (2012) 6299–6309.
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
MSc
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
Yes
Apply to be<br> considered for a student <br> award (Yes / No)?
Yes
Main supervisor (name and email)<br>and his / her institution
Prof Andre Michael Strydom
amstrydom@uj.ac.za
University of Johannesburg
Primary author
Ms
Sindisiwe Xhakaza
(Highly Correlated Matter Research Group, Department of Physics, University of Johannesburg, South Africa)
Co-authors
Prof.
Andre Strydom
(University of Johannesburg)
Dr
Buyi Sondezi
(University of Johannesburg)
