The European Physical Journal B

, Volume 73, Issue 3, pp 375–381

Structural and magnetic phases of Bi1−xAxFeO3−δ (A = Sr, Pb) perovskites

  • I. O. Troyanchuk
  • M. V. Bushinsky
  • D. V. Karpinsky
  • V. Sirenko
  • V. Sikolenko
  • V. Efimov
Solid State and Materials

DOI: 10.1140/epjb/e2010-00004-y

Cite this article as:
Troyanchuk, I., Bushinsky, M., Karpinsky, D. et al. Eur. Phys. J. B (2010) 73: 375. doi:10.1140/epjb/e2010-00004-y

Abstract

The Bi1−xAxFeO3−δ (A = Sr, Pb) systems have been studied using the X-ray, neutron powder diffraction and magnetization measurements in a magnetic field up to 14 T. It was found that around x ∼ 0.06 the crystal symmetry changes from a rhombohedral (space group R3c) to pseudo-tetragonal. In the composition range 0.07 ≤ x ≤ 0.14 the phases with different symmetry of the unit cell coexist independent of synthesis conditions. The neutron powder diffraction shows that the iron ions have average oxidation state close to 3+. The magnetic structure for Bi0.5Sr0.5FeO3−δ is found to be G-type antiferromagnetic with magnetic moment of about 3.8 μB/Fe3+. The weak ferromagnetic state due to magnetoelectric interactions was revealed in the lightly doped rhombohedrally distorted compositions. No evidence for a spontaneous magnetization was observed for the pseudo-tetragonal phases. These compositions show irreversible nonlinear magnetization vs. field behavior apparently due to small local deviations from the collinearity of the magnetic moments.

Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • I. O. Troyanchuk
    • 1
  • M. V. Bushinsky
    • 1
  • D. V. Karpinsky
    • 1
  • V. Sirenko
    • 2
  • V. Sikolenko
    • 3
    • 4
  • V. Efimov
    • 5
  1. 1.Scientific-Practical Material Research Center NAS BelarusMinskBelarus
  2. 2.Physical-Engineering Institute of Low TemperaturesKharkovUkraine
  3. 3.Helmholtz-Zentrum-Berlin for Materials and EnergyBerlinGermany
  4. 4.Laboratory for Neutron ScatteringPaul Scherrer Institute and ETH ZurichZurichSwitzerland
  5. 5.Joint Institute for Nuclear ResearchDubnaRussia