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Local A-site layering in rare-earth orthochromite Perovskites by solution synthesis
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Daniels, Luke M., Kashtiban, Reza J., Kepaptsoglou, Demie, Ramasse, Quentin M., Sloan, Jeremy and Walton, Richard I. (2016) Local A-site layering in rare-earth orthochromite Perovskites by solution synthesis. Chemistry - A European Journal, 22 (51). pp. 18362-18367. doi:10.1002/chem.201604766
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Official URL: http://dx.doi.org/10.1002/chem.201604766
Abstract
Cation size effects were examined in the mixed A-site perovskites La0.5Sm0.5CrO3 and La0.5Tb0.5CrO3 prepared through both hydrothermal and solid-state methods. Atomically resolved electron energy loss spectroscopy (EELS) in the transmission electron microscope shows that while the La and Sm cations are randomly distributed, increased cation-radius variance in La0.5Tb0.5CrO3 results in regions of localised La and Tb layers, an atomic arrangement exclusive to the hydrothermally prepared material. Solid-state preparation gives lower homogeneity resulting in separate nanoscale regions rich in La3+ and Tb3+. The A-site layering in hydrothermal La0.5Tb0.5CrO3 is randomised upon annealing at high temperature, resulting in magnetic behaviour that is dependent on synthesis route.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QD Chemistry Q Science > QE Geology |
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| Divisions: | Faculty of Science > Chemistry | ||||||||
| Library of Congress Subject Headings (LCSH): | Chromite, Perovskite, Magnetism, Electron energy loss spectroscopy | ||||||||
| Journal or Publication Title: | Chemistry - A European Journal | ||||||||
| Publisher: | Wiley - V C H | ||||||||
| ISSN: | 0947-6539 | ||||||||
| Official Date: | 12 December 2016 | ||||||||
| Dates: |
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| Volume: | 22 | ||||||||
| Number: | 51 | ||||||||
| Page Range: | pp. 18362-18367 | ||||||||
| DOI: | 10.1002/chem.201604766 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access | ||||||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Science and Technology Facilities Council (Great Britain) (STFC), Birmingham Science City, Advantage West Midlands (AWM), European Regional Development Fund (ERDF) | ||||||||
| Grant number: | EP/J500586 (EPSRC), CMPC1 1104 (STFC) |
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