Hostname: page-component-cd9895bd7-dk4vv Total loading time: 0 Render date: 2024-12-28T19:47:02.710Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of partial substitution of Cr or Mn for Ga or Fe on crystal-structure and microstructures of GaFeO3

Published online by Cambridge University Press:  01 March 2012

Z. K. Heiba ,
Ali Abo-Shama ,
M. Bakr  and
Karimat El-Sayed
Z. K. Heiba
Affiliation:
Department of Physics, Faculty of Science, Ain-Shams University, Abbassia, Cairo 1156, Egypt
Ali Abo-Shama
Affiliation:
Department of Physics, Faculty of Science, Ain-Shams University, Abbassia, Cairo 1156, Egypt
M. Bakr
Affiliation:
Department of Physics, Faculty of Science, Ain-Shams University, Abbassia, Cairo 1156, Egypt
Karimat El-Sayed
Affiliation:
Department of Physics, Faculty of Science, Ain-Shams University, Abbassia, Cairo 1156, Egypt
Get access Rights & Permissions [Opens in a new window]

Abstract

Gallium iron oxide GaFeO3 and the substituted GaFeO3 with Cr and Mn, i.e., Ga(Fe0.95Me0.05)O3, and (Ga0.95Me0.05)FeO3; Me=Cr and Mn, have been synthesized and investigated by X-ray powder diffraction. The refined structural parameters of the considered samples using the Rietveld technique showed a considerable distortion in the polyhedron around different cations, which may have an effect on the piezoelectricity of the studied samples. There are also changes in the interatomic distances between different cations, which may have a direct influence on the ferromagnetic properties of the samples. Crystallite size and microstrain are anisotropic and the largest along the b axis, which may be responsible for the piezoelectricity. The correlations between all these changeable parameters will be discussed.

Keywords

gallium iron oxidemicrostructurecrystal-structure changes by substitution
Type
Technical Articles
Information
Powder Diffraction , Volume 22 , Issue 3 , September 2007 , pp. 256 - 258
Copyright
Copyright © Cambridge University Press 2007

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Abrahams, S. C. and Reddy, J. M. (1964). “Magnetic, electric, and crystallographic properties of gallium iron oxide, ” Phys. Rev. Lett.PRLTAO10.1103/PhysRevLett.13.688 13, 688–690.CrossRefGoogle Scholar
Abrahams, S. C., Reddy, J. M., and Bernstein, J. L. (1965). “Crystal structure of piezoelectric ferromagnetic gallium iron oxide, ” J. Chem. Phys.JCPSA610.1063/1.1695868 42, 3957–3968.CrossRefGoogle Scholar
Kubota, M., Arima, T., Kaneko, Y., He, J. P., Yu, X. Z., and Tokura, Y. (2004). “X-ray directional dichroism of a polar ferromagnet, ” Phys. Rev. Lett.PRLTAO10.1103/PhysRevLett.92.137401 92, 137401.Google Scholar
Lutterotti, L. and Scardi, P. (1990). “Simultaneous structure and size-strain refinement by the Rietveld method, ” J. Appl. Crystallogr.JACGAR10.1107/S0021889890002382 23, 246–252.Google Scholar
Rado, G. T. (1964). “Observation and possible mechanism of magnetoelectric effects in a ferromagnet, ” Phys. Rev. Lett.PRLTAO10.1103/PhysRevLett.13.335 13, 335–337.CrossRefGoogle Scholar
Remeika, J. P. (1960). “GaFeO3: a ferromagnetic-piezoelectric compound, ” J. Appl. Phys.JAPIAU 31, S263–S264.CrossRefGoogle Scholar
Rietveld, H. M. (1969). “A profile refinement method for nuclear and magnetic structures, ” J. Appl. Crystallogr.JACGAR10.1107/S0021889869006558 2, 65–71.CrossRefGoogle Scholar
Wood, E. A. (1960). “The unit cell and space group of gallium iron oxide, a piezoelectric ferromagnetic crystal, ” Acta Crystallogr.ACCRA910.1107/S0365110X6000162X 13, 682.CrossRefGoogle Scholar