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|Title:||Ordered vs. disordered perovskites; structural studies of Fe-doped SrIrO3 and SrRuO3.|
|Publisher:||Academic Press Inc Elsevier Science|
|Citation:||Qasim, I., Blanchard, P. E. R., Liu, S., Tang, C. G., Kennedy, B. J., Avdeev, M., & Kimpton, J. A. (2013). Ordered vs. disordered perovskites; structural studies of Fe-doped SrIrO3 and SrRuO3. Journal of Solid State Chemistry, 206, 242-250. doi:10.1016/j.jssc.2013.08.016|
|Abstract:||The structures of the two Fe containing perovskites Sr2IrFeO6 and SrRu0.5Fe0.5O3 have been established using a combination of synchrotron and neutron diffraction methods. Sr2IrFeO6 and SrRu0.5Fe0.5O3 are shown to be monoclinic I2/m and tetragonal I4/mcm respectively The former exhibits a rock-salt like ordering of the Fe and Ir cations and displays a sequence of phase transitions associated with the loss of the octahedral tilts upon heating; 12 / m → I 4 / m → F m 3 ¯ m . The Fe and Ru cations are disordered in SrRu0.5Fe0.5O3 and this shows a single structural phase transition upon heating due to the loss of the in-phase tilts, viz. I 4 / m c m → P m 3 ¯ m . In both cases XANES measurements show partial oxidation of the Fe3+ to Fe4+. The difference in the structures between the two is remarkable given the similar size of Ir5+ and Ru5+, and this is reflected in their magnetic properties. © 2013, Elsevier Ltd.|
|Gov't Doc #:||5438|
|Appears in Collections:||Journal Articles|
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