Abstract
We study the effect of the substitution of Mn by d0 nonmagnetic ions in Pr0.50Ca0.50Mn1−xTixO3 (x=0.01, 0.03, and 0.05) manganites. Synchrotron and neutron powder diffractions have allowed us to characterize the dependence of the coexisting phases, the evolution of their relative fractions, and magnetic structures with the Ti substitution level. In consistence with the Ti4+ valence state (d0), the proportion of microdomains exhibiting pseudo-CE-type magnetic order increases with the Ti content at expenses of the CE-type regions in the material. The magnetic disorder greatly increases with Ti contents. The absence of ferromagnetism is confirmed in zero field. The apparition of magnetization steps has been further characterized by neutron powder diffraction under magnetic field.
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