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Title
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Preparation of the noncentrosymmetric ferrimagnetic phase by topochemical reduction
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Author
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Abstract
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| Topochemical reduction of La0.9Ba0.1MnO3 with NaH at 225 degrees C yields the brownmillerite phase La0.9Ba0.1MnO2.5. However, reduction with CaH2 at 435 degrees C results in the formation of La0.9Ba0.1Mn0.96O2.43 via the deintercalation of both oxide anions and manganese cations from the parent perovskite phase. Electron and neutron diffraction data reveal La0.9Ba0.1Mn0.96O2.43 adopts a complex noncentrosymmetric structure, described in space group I23, confirmed by SHG measurements. Low-temperature neutron diffraction data reveal La0.9Ba0.1Mn0.96O2.43 adopts an ordered magnetic structure in which all the nearest neighbor interactions are antiferromagnetic. However, the presence of ordered manganese cation-vacancies results in a net ferrimagnetic structure with net saturated moment of 0.157(2) mu B per manganese center. |
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Language
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English
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Source (journal)
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Journal of solid state chemistry. - London
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Publication
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London
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2020
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ISSN
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0022-4596
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DOI
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10.1016/J.JSSC.2020.121356
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Volume/pages
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287
(2020)
, p. 1-7
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Article Reference
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121356
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ISI
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000533632700029
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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