Diffusion coefficient of vacancies and jump length of electrons in Co1−xZn x Fe2O4 ferrites
Source abstract
Abstract
A series of polycrystalline samples of Co1−xZn x Fe2O4 where (x = 0.1, 0.2, 0.3, 0.4, 0.5 and 0.6) were prepared by the usual ceramic technique. X-ray diffraction patterns confirmed the spinel cubic structure. The diffusion coefficients of oxygen vacancies were estimated from dc conductivity measurements. It was noticed that the diffusion coefficient decreases with increasing Zn2+ concentrations. An increase of temperature increases the diffusion of lattice vacancies. The Curie temperature, lattice parameter and jump length of electrons were studied as a function of Zn2+ concentration. From the correlation between the ionic radius and the radii of octahedral and tetrahedral sites, the theoretical lattice parameters were calculated and suggested cation distribution for the given ferrites was determined.
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Research context
OpenAlex topics: Magnetic Properties and Synthesis of Ferrites · Metallic Glasses and Amorphous Alloys · Magnetic Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (20)
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1. Stoppls D. Developments in soft magnetic powder ferrites. J Magn Magn Mater 1996, 160: 323–328.10.1016/0304-8853(96)00216-8 ↗
2. Viswanathan B, Murthy VRK. Ferrite Materials: Science and Technology. New Delhi: Narosa Publishing House, 1990: 429–434.
3. Montiel H, Alvarez G, Gutiérrez MP, et al. Microwave absorption in Ni-Zn ferrites through the Curie transition. J Alloys Compd 2004, 369:141–143.10.1016/j.jallcom.2003.09.074 ↗
4. Aoyama T, Hirota K, Yomaguch O. Characterization and low-temperature sintering of reactive Mn-Zn ferrite powder. J Am Ceram Soc 1996, 79: 2792–2794.10.1111/j.1151-2916.1996.tb09054.x ↗
5. Said MZ, Hemeda DM, Farag GZ, et al. Structural, electrical and inferared studies of Ni0.7 CD0.3 SMx Fe2−x O4 ferrite. Orient J Phys 2009, 1: 17–29.
6. Sileo EE, Rotelo R, Jacobo SE. Nickel-Zinc ferrites prepared by the citrate precursor method. Phys B: Condens Matter 2002, 320: 257–260.10.1016/S0921-4526(02)00705-6 ↗
7. Kumar A, Sharma S. Measurement of dielectric constant and loss factor of the dielectric material at microwave frequencies. Progress Electromagn Res 2007, 69: 47–54.10.2528/PIER06111204 ↗
8. Hemeda OM, El-Saadawy M, Barakat MM. The diffusion study of oxygen atoms in Cox/3Ni(5−x)/3Sb1/3Fe1O4 ferrite. J Magn Magn Mater 2000, 219: 73–77.10.1016/S0304-8853(00)00345-0 ↗
9. Wang WR, Wang SF, Lin YM. Low temperature sintering of (Zn1−x Mgx) TiO3 microwave dielectric. Ceram Int 2005, 31: 905–909.10.1016/j.ceramint.2004.09.017 ↗
10. Samaras D. The rotation of the magnetization in the BaCo2Fe16O27 W-type hexagonal ferrite. J Magn Magn Mater 1989, 79: 193–197.10.1016/0304-8853(89)90098-X ↗
11. El-Saadawy M.The diffusion coefficient of vacancies and jump length of electrons in nickel doped magnesium ferrite. Orient J Phys 2009, 1: 9–16.
12. El-Saadawy M, Barakat MM. Effect of jump length of electrons on the physical properties of Mn-doped Co0.6Zn0.4MnxFe2−xO4 ferrite. J Magn Magn Mater 2000, 213: 309.10.1016/S0304-8853(99)00806-9 ↗
13. El-Saadawy M. The diffusion coefficient of vacancies and jump length of electrons in MgFe2−xCrxO4 ferrites. J Int Ceram Rev 2006, 55: 18–21.
14. El-Saadawy M, Isam E. The diffusion coefficient of vacancies and jump length in Cox/3 Ni(5−x)/3Sb1/3Fe1O4 ferrites. J Abhth Al-Yarmouk 2002, 11(2B): 205–212.
15. El-Saadawy M. Analysis of power loss at high frequency for ZnMn -W type hexagonal ferrites. Orient J Phys 2009, 1(1–2): 31–38.
16. Hemeda OM, El-saadawy M. Effect of gamma irradiation on the structural properties and diffusion coefficient in Co-Zn ferrite. J Magn Magn Mater 2003, 256: 63–68.10.1016/S0304-8853(02)00373-6 ↗
17. Lebourgeois R. Permeability mechanisms in high frequency polycrystalline ferrites. J Magn Magn Mater 1996, 160: 329–332.10.1016/0304-8853(96)00217-X ↗
18. Jin ZQ, Lin JP. Rapid thermal processing of magnetic materials. J Phys D: Appl Phys 2006, 39: 227–244.10.1088/0022-3727/39/14/R01 ↗
19. El-Saadawy M, Henaish MA.Thermal and electrical transport properties of Zn2−xCuxBa1Fe16O27 hexagonal ferrite. J Int Ceram Rev 2001, 50(3): 203–207.
20. Aoyama T, Hirota K, Yomaguch O. Magnetic properties of MgxZn1−x2W and MnxZn1−x2W ferrites. J Am Ceram Soc 1996, 79(10): 2792–2794.10.1111/j.1151-2916.1996.tb09054.x ↗