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- Title
Crystal and magnetic structures of the Bi<sub>1 − x</sub>Sr<sub> x</sub>FeO<sub>3 − δ</sub> and Bi<sub>1 − x</sub>A<sub> x</sub>Fe<sub>1 − x</sub>Mn<sub> x</sub>O<sub>3</sub> ( A = Sr, Ca) solid solutions.
- Authors
Troyanchuk, I. O.; Karpinskiĭ, D. V.; Bushinskiĭ, M. V.; Chobot, A. N.; Pushkarev, N. V.; Prohnenko, O.; Kopcewicz, M.; Szymczak, R.
- Abstract
Bi1 − xSr xFeO3 − x/2 (I), Bi1 − xSr xFe1 − xMn xO3 (II), and Bi1 − xCa xFe1 − xMn xO3 (III) solid solutions have been obtained. Their magnetization has been measured by X-ray and neutron diffraction and Mössbauer spectroscopy. According to the Mössbauer spectroscopy data, iron ions are in the trivalent state in system I. Near the concentration x ≈ 0.2, rhombohedral distortions (sp. gr. R3 c) are transformed into tetragonal ( P4/ mmm). The symmetry of system II changes at x > 0.2 ( R3 c → R3 c), whereas orthorhombic distortions ( R3 c → Pbnm) arise in system III at x > 0.2. The magnetic structure is antiferromagnetic (of G type). The samples of systems II and III exhibit weak ferromagnetism at x > 0.2 due to the Dzyaloshinski-Moriya interaction.
- Subjects
BISMUTH crystals; BISMUTH compounds; SOLID solutions; SPECTRUM analysis; NEUTRONS; FERROMAGNETISM
- Publication
Crystallography Reports, 2009, Vol 54, Issue 7, p1172
- ISSN
1063-7745
- Publication type
Article
- DOI
10.1134/S1063774509070074