Neutron diffraction study of the low-temperature transitions in the SrMo0.9Co0.1O3 oxide

SrMo0.9Co0.1O3 perovskite has recently been described as a performing anode material in solid-oxide fuel cells (SOFC). In this work, we describe the structural phase transitions that this oxide undergoes below room-temperature, studied by "in-situ" neutron powder diffraction (NPD). data and differential scanning calorimetry (DSC) measurements. The oxide is defined in a cubic unit cell with space group Pm (3) over barm at room temperature. Upon cooling the sample, two structural phase transitions appear, the first one from the cubic structure to a tetragonal I4/mcm structure close to 240 K, and the second one to an orthorhombic Imma phase below 150 K. By DSC measurements the first phase transition was identified to happen at 243 K. (C) 2015 Elsevier B.V. All rights reserved.