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Abstract content <br> (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>
Ce8Pd24(Al1−xSnx ), (0≤ x ≤ 1) has been studied by magnetic susceptibility, (T), magnetization,
M(μ0H), electrical resistivity, ρ(T), thermoelectric power, S(T), and thermal conductivity, λ(T), measurements. All investigated compositions crystallize in a cubic AuCu3 – type crystal structure with space group Pm−3m (No. 221). (T) data at high temperature follows the paramagnetic Curie – Weiss relation with negative Weiss temperatures θp and effective magnetic moments μeff close to the value of 2.54 μB expected for the free Ce3+ - ion. The low temperature dc (T) data indicate an antiferromagnetic (AFM) anomaly for all compositions between 0 ≤ x ≤ 1, associated with a Néel temperature ranging from TN = 4.3 K to 6.9 K between the two end compounds. Field – cooling (FC) and zero – field – cooling (ZFC) (T) data indicates spin – glass behaviour at Al concentrated alloys. ρ(T) data is dominated by coherent Kondo lattice scattering for alloys in the concentration range 0 ≤ x ≤ 0.5 and by crystal –electric field (CEF) effect for alloys with x ≥ 0.7. At low temperature ρ(T) data indicate a steep decrease at TN associated with magnetic phase transition also observed in the (T) results. Below TN, ρ(T) is described by a spin – wave dispersion relation. At low temperatures, S(T) data measurements indicate an AFM transition at TN corresponding to the (T) and ρ(T) results. The high temperature S(T) data is described by the phenomenological resonance model giving the Kondo temperature TK and the characteristic temperature TCEF associated with crystal - electric field effect. λ(T) increase linearly with temperatures from low T. The reduced Lorentz number, L/L0 increase upon cooling and exhibit maxima which decrease in magnitude with increase x, while the figure of merit (ZT=S2T/ρ) exhibit maxima and minima upon cooling and the magnitude at room temperature decreases with x.
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