The magnetic, electrical and magnetotransport properties of spinel-type
Mg(Fe0.8Ga0.2)2O4 δ ceramic ferrites have been investigated. The results of the
investigations temperature and field dependences of magnetization and
resistivity are presented and analyzed. The data of neutron scattering were
found to be in good agreement with the Neel model of ferrimagnetism. This
compound is magnetomonophase ferrimagnetic in the wide range of temperatures,
and shows transition in paramagnet at high temperature (~490 K). Mg(Fe0.8Ga0.2)2O4 δ is characterized by maximal
value of magnetization (28 emu/g) in the range of Mg(Fe1-xGax)2O4 δ solid solutions. A negative magnetoresistance
(MR) effect has been observed in Mg(Fe0.8Ga0.2)2O4 δ ferrite spinel. It has been determined
that coefficient of the negative MR increased from 0.23% (at room temperature)
to 7.28% (at 220 K). It can be explained with the help of the spin-dependent
scattering on magnetic inhomogeneity of granular boundary.
Cite this paper
Trukhanov, A. V. , Trukhanov, S. V. , Smirnov, O. P. , Kulikov, A. A. and Szymczak, H. (2015). Magnetic, Electrical and Magnetotransport Properties of Mg(Fe0.8Ga0.2)2O4 δ Obtained by Pyrohtdrolitic Method. Open Access Library Journal, 2, e842. doi: http://dx.doi.org/10.4236/oalib.1100842.
Nagaev, E.L. (1988) Photoinduced
Magnetism and Conduction Electrons in Magnetic Semiconductors. Physica Status Solidi B, 145, 11-64. http://dx.doi.org/10.1002/pssb.2221450102
Ohno, H., Shen,
A., Matsukura,
F., Oiwa,
A., Endo,
A., Katsumoto,
S. and Iye, Y.
(1996) (Ga,Mn)As:
A New Diluted Magnetic Semiconductor Based on GaAs. Applied
Physics Letters, 69, 363-365. http://dx.doi.org/10.1063/1.118061
Dietl,
T., Ohno, H.,
Matsukura, F.,
Cibert, J. and Ferrand, D.
(2000) Zener
Model Description of Ferromagnetism in Zinc-Blende Magnetic Semiconductors. Science, 287, 1019-1022. http://dx.doi.org/10.1126/science.287.5455.1019
Poole, C.P. and
Farach, H.A. (1982) Monte Carlo Study of the Local-Field
Distribution in the Diluted Mantiferromagnetic Ising Model on the Triangular
Lattice. Physica B, 47, 55-59.
Antoshina, L.G. (2001) The Behaviour of the Magnetostriction and Magnetoresistance
of the Ferrite CuGa0.4Al0.8Fe0.8O4 with Frustrated Magnetic Structure. Journal of Physics: Condensed Matter, 13, 127-133. http://dx.doi.org/10.1088/0953-8984/13/5/103
Akther Hossain, A.K.M., Tabata, H. and Kawai, T. (2008) Magnetoresistive Properties of Zn1-xCoxFe2O4 Ferrites. Journal of Magnetism and Magnetic Materials, 320, 1157-1162. http://dx.doi.org/10.1016/j.jmmm.2007.11.009