Structural studies and magnetic and transport properties of Cr-substituted La0.67Ba0.33Mn1−x Cr x O 3 (0≤ x ≤0.15) perovskites - Oumezzine, Marwène; Peña, Octavio; Kallel, Sami; Guizouarn, Thierry; Oumezzine, Mohamed (Journal of Alloys & Compounds, 2012)