A careful phase analysis and TEM investigation of the incommensurately modulated, (Bi1-xMII)FeIIIO3-x/2 (M = Ca and Sr), solid solution phases

R. L. Withers, J. Schiemer, L. Bourgeois, L. Norén, Y. Liu

Research output: Contribution to journalArticleResearchpeer-review

Abstract

A careful phase (Bi1-xCax)FeIIIO 3-x/2Vx/2 (V for vacancy), ∼0.20 ≤ x(Bi 1-xSrx)Fe3+O3-x/2Vx/2, 0.2 ≤ x ≤ 0.67, perovskite related solid solution fields has been carried out. Both solid solution fields are, in general, (3+1)-d incommensurately modulated with an incommensurate primary modulation wave-vector magnitude that varies systematically with composition. High Resolution (HR)TEM imaging is used to show the presence of at least 6-fold twinning on a sometimes rather fine scale, the fine scale twinning being more prevalent in the M = Sr than the M = Ca system. The (3+1)-d superspace group symmetry is suggested to be Cmmm (01γ) 0s0 or one of the non-centrosymmetric sub-groups thereof. The magnetic and electrical properties of the systems are briefly discussed and a tentative structural model proposed. 

Original languageEnglish
Article number012015
Pages (from-to)1-6
Number of pages6
JournalJournal of Physics: Conference Series
Volume226
Issue number1
DOIs
Publication statusPublished - 2010

Cite this

@article{88a37f7cfe83409097af3081a7abeb22,
title = "A careful phase analysis and TEM investigation of the incommensurately modulated, (Bi1-xMII)FeIIIO3-x/2 (M = Ca and Sr), solid solution phases",
abstract = "A careful phase (Bi1-xCax)FeIIIO 3-x/2Vx/2 (V for vacancy), ∼0.20 ≤ x(Bi 1-xSrx)Fe3+O3-x/2Vx/2, 0.2 ≤ x ≤ 0.67, perovskite related solid solution fields has been carried out. Both solid solution fields are, in general, (3+1)-d incommensurately modulated with an incommensurate primary modulation wave-vector magnitude that varies systematically with composition. High Resolution (HR)TEM imaging is used to show the presence of at least 6-fold twinning on a sometimes rather fine scale, the fine scale twinning being more prevalent in the M = Sr than the M = Ca system. The (3+1)-d superspace group symmetry is suggested to be Cmmm (01γ) 0s0 or one of the non-centrosymmetric sub-groups thereof. The magnetic and electrical properties of the systems are briefly discussed and a tentative structural model proposed. ",
author = "Withers, {R. L.} and J. Schiemer and L. Bourgeois and L. Nor{\'e}n and Y. Liu",
year = "2010",
doi = "10.1088/1742-6596/226/1/012015",
language = "English",
volume = "226",
pages = "1--6",
journal = "Journal of Physics: Conference Series",
issn = "1742-6588",
publisher = "IOP Publishing",
number = "1",

}

A careful phase analysis and TEM investigation of the incommensurately modulated, (Bi1-xMII)FeIIIO3-x/2 (M = Ca and Sr), solid solution phases. / Withers, R. L.; Schiemer, J.; Bourgeois, L.; Norén, L.; Liu, Y.

In: Journal of Physics: Conference Series, Vol. 226, No. 1, 012015, 2010, p. 1-6.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - A careful phase analysis and TEM investigation of the incommensurately modulated, (Bi1-xMII)FeIIIO3-x/2 (M = Ca and Sr), solid solution phases

AU - Withers, R. L.

AU - Schiemer, J.

AU - Bourgeois, L.

AU - Norén, L.

AU - Liu, Y.

PY - 2010

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N2 - A careful phase (Bi1-xCax)FeIIIO 3-x/2Vx/2 (V for vacancy), ∼0.20 ≤ x(Bi 1-xSrx)Fe3+O3-x/2Vx/2, 0.2 ≤ x ≤ 0.67, perovskite related solid solution fields has been carried out. Both solid solution fields are, in general, (3+1)-d incommensurately modulated with an incommensurate primary modulation wave-vector magnitude that varies systematically with composition. High Resolution (HR)TEM imaging is used to show the presence of at least 6-fold twinning on a sometimes rather fine scale, the fine scale twinning being more prevalent in the M = Sr than the M = Ca system. The (3+1)-d superspace group symmetry is suggested to be Cmmm (01γ) 0s0 or one of the non-centrosymmetric sub-groups thereof. The magnetic and electrical properties of the systems are briefly discussed and a tentative structural model proposed. 

AB - A careful phase (Bi1-xCax)FeIIIO 3-x/2Vx/2 (V for vacancy), ∼0.20 ≤ x(Bi 1-xSrx)Fe3+O3-x/2Vx/2, 0.2 ≤ x ≤ 0.67, perovskite related solid solution fields has been carried out. Both solid solution fields are, in general, (3+1)-d incommensurately modulated with an incommensurate primary modulation wave-vector magnitude that varies systematically with composition. High Resolution (HR)TEM imaging is used to show the presence of at least 6-fold twinning on a sometimes rather fine scale, the fine scale twinning being more prevalent in the M = Sr than the M = Ca system. The (3+1)-d superspace group symmetry is suggested to be Cmmm (01γ) 0s0 or one of the non-centrosymmetric sub-groups thereof. The magnetic and electrical properties of the systems are briefly discussed and a tentative structural model proposed. 

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