Abstract
(Pr 0.55Ca 0.45)(Mn 1− y Cr y )O 3 (with y = 0.00, 0.03 and 0.06) have been prepared by means of a solid-state reaction from stoichiometric powder mixtures of binary oxides. XRPD reveals the formation of the perovskite-type compound for the whole compositions; no evidence for secondary phases may be detected. The structural refinements have been carried out using XRPD data applying the Rietveld method; the lattice parameters of the orthorhombic cell faintly change with composition. On the contrary the tilting of the octahedra results strongly dependent on the concentration of Cr in the 4 b site. DC magnetic measurements have been performed as a function of temperature and magnetic field.
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