Abstract
The Mössbauer effect has been studied in the mixed ferrites Co x Fe3−x O4 (forx=0.8, 0.9 and 1) with the spinel structure in the temperature range between 78 and 380 K. The composition withx=1, showed an expected Zeeman spectrum with two overlapping magnetic hyperfine patterns related to the Fe3+ ions in tetrahedral and octahedral sites. While for samples withx=0.8 and 0.9 the Mössbauer spectrum for each compound was successfully analysed into three different patterns corresponding to the ferric ions placed at the tetrahedral and octahedral sites and ferrous ions at the octahedral sites, indicating no electron transfer between Fe3+ and Fe2+, where the quantity of cobalt is sufficiently large to be located at the six nearest neighbours to ferrous ions. The Mössbauer effect parameters were calculated for these observed sites and their variation with temperature reported. The reduced hyperfine magnetic fields of the Fe3+ (B) ions were found to follow the Brillouin curve forS=5/2 and one third power law. The magnetic ordering temperature was determined to be ≃815 K and the possible magnetic interactions were discussed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Daniels, J.M., Rosencwaig, A.: J. Phys. Chem. Solids30, 1561 (1969)
Kundig, W., Hargrove, R.S.: Solid State Commun.7, 223 (1969)
Sawatzsky, G.A., Coey, J.M., Morrish, A.H.: J. Appl. Phys.40, 1402 (1969)
Cullen, T.R., Callen, E.: J. Appl. Phys.41, 879 (1970)
Mada, J., Iida, S.: J. Phys. Soc. Jpn.39, 1627 (1975)
Naugnam, U.K., Evans, B.J.: Phys. Rev. B14, 2956 (1976)
Dehe, G., Seidel, B., Melzer, K., Michalk, C.: Phys. Status Solidi (b)31, 439 (1975)
Melzer, K. Dehe, G., Mehner, H.: J. Phys. Colloque C1, 41, C1–181 (1980)
Vanleerberghe, R., Degrave, E., Vandenberghe, R.E., Robbrecht, G.G.: J. Phys. Colloque C1, 41, C1–179 (1980)
Franke, H., Rosenberg, M.: Physica86–88B, 965 (1977)
Smith, J., Wijn, H.: Ferrites. New York: Wiley 1959
Fayek, M.K., Abbas, Y.M.: Arab. J. Nucl. Sci.14 (1981) (in print)
Bacon, G.: Neutron diffraction monographs on the physics and chemistry of materials. London: 1962
Verwey, E.J.W., Haayman, P.H., Romejn, F.C.: J. Chem. Phys.15, 181 (1947)
Ono, E., Ito, A.: J. Phys. Soc. Jpn.19, 899 (1964)
Woude, F.V.D., Sawatzky, C.A., Morrish, A.H.: Phys. Rev.167, 533 (1969)
Ito, A., Ono, K., Ishikawa, Y.: J. Phys. Soc. Jpn.18, 1465 (1963)
Bauminger, R., Cohen, S.G., Marinova, A., Ofer, S., Segal, E.: Phys. Rev.122, 1447 (1961)
Cser, L., Gladkih, I.: KFKI 29 Budapest (1968)
Sawatzky, G.A., Vanderwoude, F., Morrish, A.H.: Phys. Rev.187, 747 (1969)
Franke, H., Rosenberg, M.: J. Mag. Mag. Mater.4, 186 (1977)
Pointon, A.J., Robertson, J.M.: Philos. Mag.12, 725 (1965)
Robin, J.: J. Am. Chim10, 393 (1955)
Bahgat, A.A.: Ph. D. Thesis Cairo (1975)
Goodenough, J.B., Loeb, A.L.: Phys. Rev.98, 391 (1955)
Hudson, A., Whitfield, H.J.: Mol. Phys.12, 165 (1967)
Walker, L.R., Wertheim, G.K., Jaccarino, V.: Phys. Rev. Lett.6, 98 (1961)
Bancroft, G.M.: Mössbauer Spectroscopy. London: McGraw Hill 1973
Bloss, F.D.: Crystallography and Crystal Chemistry. New York: Holt, Rinehart and Winston Inc. 1971
Danon, J.: IEAE Techn. Rep. Ser. 50 Vienna (1963)
Dobson, D.C., Linett, J.W., Rahman, M.M.: J. Phys. Chem. Solids31, 2227 (1970)
Martin, D.H.: Magnetism in solids. London: Llife Bookt Ltd. 1967
Eibschutz, M., Shtrikman, K., Treves, D.: Solid State Commun.141 (1966)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Fayek, M.K., Bahgat, A.A. Fe57 Mössbauer study in cobalt substituted magnetite. Z. Physik B - Condensed Matter 46, 199–205 (1982). https://doi.org/10.1007/BF01360294
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF01360294