Abstract
A cerium based intermetallic compound, CeAg0.68Si1.32, has been synthesized using arc melting technique and its magnetic, transport and thermodynamic properties have been investigated. The sample crystallizes in hexagonal-AlB2 type CeAg0.68Si1.32 phase (space group: P6/mmm) with lattice parameters: a = 0.4208(2) nm; c = 0.4156(2) nm, along with a minor impurity phase. The alloy undergoes two magnetic transitions at temperatures T1 = 8 K and T2 = 3.3 K in a magnetic field of B = 0.01 T. The former is ferromagnetic in nature and the latter corresponds to antiferromagnetic transition. In B~ 0.1 T, antiferromagnetic coupling is broken and metamagnetic transition is witnessed. The influence of CEF is reflected in the estimated μeff and μsat which are lower than that of the theoretical value predicted for Ce3+ ion. The Sommerfeld coefficient(γ) is higher than the normal metals implying CeAg0.68Si1.32 is a moderate heavy Fermion system with complex magnetic interactions.
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