Abstract
Composites of CuFe2O4 and BaTiO3 were prepared using a conventional ceramic double sintering process. The presence of both phases was confirmed by X-ray diffraction. The variations of resistivity and thermo emf with temperature in these samples were studied. All the composites showed n-type behaviour. The variation of dielectric constant (έ′) in the frequency range 100 Hz to 1 MHz and with temperature at constant frequency were studied. The conduction phenomenon was explained on the basis of a small polaron-hopping model. Also confirmation of this phenomenon was made with the help of a.c. conductivity measurements. The static value of the magnetoelectric conversion factor, i.e. d.c. (ME)H was studied as a function of intensity of the magnetic field. The maximum value of ME coefficient was observed for 75% ferroelectric phase composite.
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References
Appel J 1968Solid state phy. (eds) F Seitz, D Thurnbull and Ehrenreich H 1968 (NY: Academic Press)21 p. 193
Austin I G and Mott N F 1969Adv. Phys. 18 41
Boomgaard J, Van Den and Born R A J 1978J. Mater. Sci. 13 1538
Ce-Wen Nan 1994Phys. Rev. B50 6082
Eatch A I, Ghani A A, El. Shahat M F and Faramawy E I 1987Phys. Status Solidi (a)104 793
Klinger M I 1975J. Phys. C8 3595
Kumar Krishan C C, Wu S and Mason T C 1987J. Solid State Chem. 37 144
Lalitha Sirdeshmukh, Krishna Kumar K, Bal Laxman S, Rama Krishna A and Sathaiah G 1998Bull. Mater. Sci. 21 219
Lopatin S S 1994Ferroelectrics 162 63
Miyahara S and Kino Y 1965Jap. J. Appl. Phys. 4 310
Nanba N and Kobayashi S 1978Jap. J. Appl. Phys. 17 1819
Patil S A 1980Studies on physical properties of Cu xFe3-xO4 ferrites, Ph.D. Thesis, Shivaji University, Kolhapur
Patil S A, Patil B L, Lotke S D and Patil R N 1996Phase Trans. 56 29
Schmid H 1994Bull. Mater. Sci. 17 1411
Stierstadt K, Benz H and Rechenberg H 1964Proc. int. conf. magnetism (Nottingham UK: Institute of Physics) p. 605
Suryanarayana S V 1994Bull. Mater. Sci. 17 1259
Van Suchtelen 1972J. Phillips Res. Rep. 27 28
Verwey E J W and Heilman 1947J. Chem. Phys. 15 174
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Mahajan, R.P., Patankar, K.K., Kothale, M.B. et al. Conductivity, dielectric behaviour and magnetoelectric effect in copper ferrite-barium titanate composites. Bull Mater Sci 23, 273–279 (2000). https://doi.org/10.1007/BF02720082
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DOI: https://doi.org/10.1007/BF02720082