Inelastic Neutron scattering in CeSi2-xGax ferromagnetic Kondo lattice compounds
K. R. Priolkar, Mala N. Rao, R. B. Prabhu, P. R. Sarode, S. K. Paranjpe, P. Raj, A. Sathyamoorthy
Abstract
Inelastic neutron scattering investigation on ferromagnetic Kondo lattice compounds belonging to CeSi2-xGax, x = 0.7, 1.0 and 1.3, system is reported. The thermal evolution of the quasielastic response shows that the Kondo interactions dominate over the RKKY interactions with increase in Ga concentration from 0.7 to 1.3. This is related to the increase in k-f hybridization with increasing Ga concentration. The high energy response indicates the ground state to be split by crystal field in all three compounds. Using the experimental results we have calculated the crystal field parameters in all three compounds studied here.
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