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Using a two-orbital model and Monte Carlo simulations, we investigate theeffect of nonmagnetic B-site substitution on half-doped CE-type manganites. Thelattice defects induced by this substitution destabilize the CE phase, whichtransforms into (1) the ferromagnetic (FM) metallic competing state, or (2) aregime with short-range FM clusters, or (3) a spin-glass state, depending oncouplings and on the valence of the B-site substitution. While a C-typeantiferromagnetic state is usually associated with an average $e_{\rm g}$charge density less than 0.5, the nonmagnetic B-site substitution that lowersthe $e_{\rm g}$ charge density is still found to enhance the FM tendency in oursimulations. The present calculations are in qualitative agreement withexperiments and provide a rationalization for the complex role of nonmagneticB-site substitution in modulating the phase transitions in manganites.

Non-magnetic B-site Impurities Induce Ferromagnetic Tendencies in CE Manganites