We present a comprehensive study on origin of Spin Glass (SG) property in polycrystalline La0.5Bi0.5MnO3 perovskite oxide using linear and higher order ac susceptibility (χ) measurements. The third order harmonic susceptibility (χ3) vs. temperature (K) with varying magnetic fields from 0.95 to 9.45 Oe and the divergence in their χ3 (max) allows us to infer the SG behavior occurring in the sample possibly due to co-operative freezing of the spins.

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