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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

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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
Subjects: Q Science > QD Chemistry
Q Science > QE Geology
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:
DateEvent
12 December 2016Published
3 November 2016Available
11 October 2016Accepted
Date of first compliant deposit: 22 December 2016
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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