10.1186/2193-8865-3-63

Magnetic properties of Cr-substituted Co-ferrite nanoparticles synthesized by citrate-gel autocombustion method

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  • M Raghasudha1,
  • D Ravinder*2,
  • P Veerasomaiah3,
  1. Department of Chemistry, Jayaprakash Narayan College of Engineering, Mahabubnagar, Andhra Pradesh, 509001, IN
  2. Department of Physics, Nizam College, Basheerbagh Osmania University, Hyderabad, 500001, IN
  3. Department of Chemistry, Osmania University, Hyderabad, Andhra Pradesh, 500007, IN
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Published in Issue 02-08-2013

How to Cite

Raghasudha, M., Ravinder, D., & Veerasomaiah, P. (2013). Magnetic properties of Cr-substituted Co-ferrite nanoparticles synthesized by citrate-gel autocombustion method. Journal of Nanostructure in Chemistry, 3(1 (December 2013). https://doi.org/10.1186/2193-8865-3-63
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Abstract

Abstract A series of Co-Cr nanoferrites having the chemical formula CoCr x Fe 2 − x O 4 ( x = 0.0, 0.1, 0.3, 0.5, 0.7, 0.9, and 1.0) were synthesized by citrate-gel autocombustion method at a very low temperature (180°C). The X-ray diffraction analysis of as-synthesized powders and sintered powders has confirmed the formation of single-phase cubic spinel structure. The average particle size of the synthesized ferrites was 6 to 12 nm. Magnetic susceptibility measurements using Faraday magnetic susceptibility balance showed the paramagnetic nature of the ferrites. Magnetic properties of Co-Cr nanoferrites were measured using a vibrating sample magnetometer at room temperature in the applied field of 15 kOe. The saturation magnetization decreased from 33.84 to 13.83 emu/g with increase in Cr 3+ concentrations, indicating the fact that the lesser magnetic Cr 3+ ions substitute Fe 3+ ions in the octahedral sublattice of the ferrite. With improvement in the magnetic properties, the synthesized nanoferrites become soft magnetic materials. Such materials are useful in transformer and motor cores to minimize the energy dissipation with the alternating fields associated with AC electrical applications. The coercivity of pure CoFe 2 O 4 was larger than that of the Cr-doped cobalt ferrites.

Keywords

  • Co-Cr nanoferrites,
  • Citrate-gel method,
  • Magnetic susceptibility,
  • Saturation magnetization,
  • Vibrating sample magnetometer,
  • Coercivity
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References

  1. Vanaja et al. (2013) Phytosynthesis of silver nanoparticles by Cissus quadrangularis: influence of physicochemical factors https://doi.org/10.1186/2193-8865-3-17
  2. Farhadi et al. (2013) Simple preparation of ferromagnetic Co3O4 nanoparticles by thermal dissociation of the [CoII (NH3)6](NO3)2 complex at low temperature https://doi.org/10.1186/2193-8865-3-16
  3. Subhash et al. (2004) Magnetic behaviour of nano-particles of Ni0.5Co0.4Fe2O4 prepared using two different routes (pp. 366-367)
  4. Costa et al. (2010) Dielectric and impedance properties, studies of the lead doped (PbO)-CO2Y type hexa ferrite (Ba2CO2Fe12O22(CO2Y)) (pp. 35-39) https://doi.org/10.1016/j.matchemphys.2010.03.026
  5. Muzquiz-Ramos et al. (2010) Preparation and properties of CoFe2O4 synthesized by the modified citrate-gel method (pp. 39-42) https://doi.org/10.4028/www.scientific.net/MSF.644.39
  6. Pervaiz and Gul (2012) Enhancement of electrical properties due to Cr3+ substitution in Co-ferrite nanoparticles synthesized by two chemical techniques (pp. 3696-3703) https://doi.org/10.1016/j.jmmm.2012.05.050
  7. Bahout et al. (2005) Synthesis and characterization of Zn1−xNixFe2O4 spinels prepared by a citrate precursor (pp. 1080-1086) https://doi.org/10.1016/j.jssc.2005.01.009
  8. Kim et al. (2003) Synthesis and characterization of CoFe2O4 magnetic nanoparticles prepared by temperature controlled coprecipitation method (pp. 42-51) https://doi.org/10.1016/S0921-4526(03)00322-3
  9. Liu et al. (2000) Chemical control of superparamagnetic properties of magnesium and cobalt spinel ferrite nanoparticles through atomic level magnetic couplings (pp. 6263-6267) https://doi.org/10.1021/ja000784g
  10. Chau et al. (2006) Microwave plasma synthesis of Co and SiC-coated Co nanopowders (pp. 947-951) https://doi.org/10.1016/j.matlet.2005.10.054
  11. Deng et al. (2001) Ultrafine zinc oxide powders prepared by precipitation/mechanical milling (pp. 3273-3276) https://doi.org/10.1023/A:1017902923289
  12. Pradeep et al. (2008) Production of single phase nano size NiFe2O4 particles using sol–gel auto combustion route by optimizing the preparation conditions (pp. 572-576) https://doi.org/10.1016/j.matchemphys.2008.05.090
  13. Zheng et al. (2004) Multiferroic BaTiO3-CoFe2O4 nanostructures (pp. 661-663) https://doi.org/10.1126/science.1094207
  14. Raghasudha et al. (2013) Characterization of chromium substituted cobalt nano ferrites synthesized by citrate-gel auto combustion method (pp. 89-96) https://doi.org/10.4236/ampc.2013.32014
  15. Toksha et al. (2011) Autocombustion high-temperature synthesis, structural, and magnetic properties of CoCrxFe2-xO4 (0≤x≤1.0) (pp. 20905-20912)
  16. Carlin (1986) Springer https://doi.org/10.1007/978-3-642-70733-9
  17. Figgis and Nyholm (1958) A convenient solid for calibration of gouy magnetic susceptibility apparatus (pp. 4190-4216) https://doi.org/10.1039/jr9580004190
  18. Gul and Maqsood (2008) Structural, magnetic and electrical properties of cobalt ferrites prepared by the sol–gel route (pp. 227-231) https://doi.org/10.1016/j.jallcom.2007.11.006
  19. Gul et al. (2007) Structural, magnetic and electrical properties of Co1−xZnxFe2O4 synthesized by co-precipitation method https://doi.org/10.1016/j.jmmm.2006.08.005
  20. Shirsath et al. (2011) Influence of Ce4+ ions on the structural and magnetic properties of NiFe2O4 https://doi.org/10.1063/1.3603004
  21. Batoo et al. (2009) Study of dielectric and ac impedance properties of Ti doped Mn ferrites (pp. 1397-1406) https://doi.org/10.1016/j.cap.2009.03.012
  22. Mane et al. (2010) Structural and magnetic characterizations of Mn-Ni-Zn ferrite nanoparticles (pp. 2355-2363) https://doi.org/10.1002/pssa.201026079
  23. Singhal and Chanda (2007) Cation distribution and magnetic properties in chromium-substituted nickel ferrites prepared using aerosol route (pp. 296-300) https://doi.org/10.1016/j.jssc.2006.10.010