TY - JOUR
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
Y1 - 2010
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.
UR - http://www.scopus.com/inward/record.url?scp=77954722312&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/226/1/012015
DO - 10.1088/1742-6596/226/1/012015
M3 - Conference article
SN - 1742-6588
VL - 226
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012015
T2 - 6th International Conference on Aperiodic Crystals, APERIODIC'09
Y2 - 13 September 2009 through 18 September 2009
ER -