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For the first time, we find that the dynamic antiferromagnetic phase presentin CeFe2 gets stabilized with Ga and Si substitutions. We find that phenomenasuch as strain-induced first order jumps in the magnetization curves, asymmetrybetween the M-H curves during the increasing and decreasing field cycles, theenvelope curve being inside the virgin curve, occur in these compounds.Temperature and time dependences of magnetization show that the compoundspossess glassy behavior at low temperatures. Multi-step magnetization behavior,unusual relaxation effect, thermal and magnetic history dependence, which aresignatures of the martensitic scenario due to the strong magneto-structuralcoupling, are found to be present in this system. We also show that one caninduce the magnetization steps with the help of appropriate measurementprotocol. Detailed magnetization relaxation studies have been carried out tounderstand the dynamics of magnetic phase transition.

Magnetization jumps and relaxation effect in doped CeFe2