| Автор | J Herrero-Martín |
| Автор | J García |
| Автор | G Subías |
| Автор | J Blasco |
| Автор | C Mazzoli |
| Автор | M C Sánchez |
| Дата выпуска | 2009-11-01 |
| dc.description | The emergence of superlattice periodicities at metal to insulator transitions in hole doped perovskite oxides responds to a rearrangement of the local atomic structure, and electron and spin density distribution. Originally, the ionic model based on a checkerboard- type atomic distribution served to describe the low temperature charge and orbital ordered (COO) phases arising in half- doped manganites. In the last years, the exploitation of resonant x- ray scattering (RXS) capabilities has shown the need to revisit these concepts and improve the picture. Yet, we have realised that COO is a more common phenomenon than expected that can be observed in a wide range of doping levels. Here we compare the experimental data recently collected by RXS on La<sub>0.4</sub>Sr<sub>1.6</sub>MnO<sub>4</sub> (x=0.60) and La(Pr)<sub>1/3</sub>Sr<sub>2/3</sub>FeO<sub>3</sub> (x=0.67). The first shows a COO phase similar to that found in the x=0.5 sample but angular peak positions vs. T denotes the incommensurability of superlattice reflections. Meanwhile, the analysis of the commensurate CO phase in the studied ferrite underlines the role of the structural changes also involving La(Sr) and O atoms. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | © 2009 IOP Publishing Ltd |
| Название | Charge and orbital ordering in Fe and Mn perovskite oxides far from half- doping by resonant x- ray scattering |
| Тип | paper |
| DOI | 10.1088/1742-6596/190/1/012086 |
| Electronic ISSN | 1742-6596 |
| Print ISSN | 1742-6588 |
| Журнал | Journal of Physics: Conference Series |
| Том | 190 |
| Первая страница | 12086 |
| Последняя страница | 12091 |
| Выпуск | 1 |
