Valence changes of manganese and structural phase transitions in Sr1-xPrxMnO3 (0.1 <= x <= 0.6)

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dc.contributor.authorTan, TYen_AU
dc.contributor.authorMartin, Nen_AU
dc.contributor.authorZhou, Qen_AU
dc.contributor.authorKennedy, BJen_AU
dc.contributor.authorGu, QFen_AU
dc.contributor.authorKimpton, JAen_AU
dc.contributor.authorZhang, Zen_AU
dc.contributor.authorJang, LYen_AU
dc.date.accessioned2015-11-01T00:15:40Zen_AU
dc.date.available2015-11-01T00:15:40Zen_AU
dc.date.issued2013-05-01en_AU
dc.date.statistics2015-10-21en_AU
dc.description.abstractFifteen perovskite manganites Sr1−xPrxMnO3, x=0.1−0.6 in steps as fine as 0.025, have been synthesized by solid state methods and their crystal structures determined using synchrotron X-ray powder diffraction. At room temperature two first order phase transitions associated with changes in the orbital ordering and the tilting of the corner shared MnO6 octahedra are evident cubic/Pm3¯m⟹x≈0.15tetragonal/(I4/mcm)⟹x≈0.45orthorhombic/Imma, with two phase regions associated with both transitions. Heating the Pr rich oxide Sr0.5Pr0.5MnO3 provides a rare example where chemical pressure and temperature result in a different sequence of transitions Imma –R3¯c–Pm3¯m, reflecting the importance of the Pr 4f electrons. X-ray absorption near-edge structure (XANES) measurements at the Mn K and Pr L3 edges show the valence state of the Mn linearly decreases with increasing Pr content whereas the Pr remains +3 across the entire series. Magnetic susceptibility measurements for selected samples are presented. © 2013, Elsevier Inc.en_AU
dc.identifier.citationTan, T.-Y., Martin, N., Zhou, Q., Kennedy, B. J., Gu, Q., Kimpton, J. A., Zhang, Z., & Jang, L.-Y. (2013). Valence changes of manganese and structural phase transitions in Sr1-xPrxMnO3 (0.1 <= x <= 0.6). Journal of Solid State Chemistry, 201, 115-127. doi:10.1016/j.jssc.2013.01.034en_AU
dc.identifier.govdoc6207en_AU
dc.identifier.issn0022-4596en_AU
dc.identifier.journaltitleJournal of Solid State Chemistryen_AU
dc.identifier.pagination115-127en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.jssc.2013.01.034en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6364en_AU
dc.identifier.volume201en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectPerovskiteen_AU
dc.subjectMagnetic susceptibilityen_AU
dc.subjectOrbitsen_AU
dc.subjectCrystal structureen_AU
dc.subjectOxidesen_AU
dc.subjectSynchrotronsen_AU
dc.titleValence changes of manganese and structural phase transitions in Sr1-xPrxMnO3 (0.1 <= x <= 0.6)en_AU
dc.typeJournal Articleen_AU
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