Daniels, LM, Kashtiban, RJ, Kepaptsoglou, D et al. (3 more authors) (2016) Local A‐Site Layering in Rare‐Earth Orthochromite Perovskites by Solution Synthesis. Chemistry - A European Journal, 22 (51). pp. 18362-18367. ISSN 0947-6539
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.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
Keywords: | chromites; electron energy loss spectroscopy (EELS); hydrothermal synthesis; magnetism; perovskites |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 20 Mar 2018 14:01 |
Last Modified: | 20 Mar 2018 14:01 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/chem.201604766 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:128730 |
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