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Improvisation of structural, electrical and magnetic properties of nanocrystalline Ca2-Y hexaferrite on Al-substitution

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IJCA Proceedings on International Conference on Benchmarks in Engineering Science and Technology 2012
© 2012 by IJCA Journal
ICBEST - Number 2
Year of Publication: 2012
Authors:
P. R. Moharkar
S. R. Gawali
K. G. Rewatkar
V. M. Nanoti

P R Moharkar, S R Gawali, K G Rewatkar and V M Nanoti. Article: Improvisation of structural, electrical and magnetic properties of nanocrystalline Ca2-Y hexaferrite on Al-substitution. IJCA Proceedings on International Conference on Benchmarks in Engineering Science and Technology 2012 ICBEST(2):1-5, October 2012. Full text available. BibTeX

@article{key:article,
	author = {P. R. Moharkar and S. R. Gawali and K. G. Rewatkar and V. M. Nanoti},
	title = {Article: Improvisation of structural, electrical and magnetic properties of nanocrystalline Ca2-Y hexaferrite on Al-substitution},
	journal = {IJCA Proceedings on International Conference on Benchmarks in Engineering Science and Technology 2012},
	year = {2012},
	volume = {ICBEST},
	number = {2},
	pages = {1-5},
	month = {October},
	note = {Full text available}
}

Abstract

Calcium hexaferrites doped with Al3+ ion, Ca2Zn2Fe12-xAlxO22 (x=0, 0. 7 and 1. 0) were prepared microwave induced sol-gel combustion technique. The structure properties of the calcined samples were studied using powder X-ray diffraction (XRD). All the XRD patterns showed the single phase of the Y-type calcium hexaferrites without other intermediate phase. The lattice parameters of the synthesized sample were found to increase with increase substitution of Al3+ ion for Fe3+ ion, which is attributed to the ionic size differences of cations involved. The morphological properties of the synthesized samples were measured by using SEM. The SEM study have shown that the sample exhibit relatively well defined, hexagonal like grains with average size of less than 80 nm. X-ray density was found to decrease with the substitution. The bulk density of the sample was increased whereas the porosity was decreased with the increase in the substitution. The dc electrical conductivity measurements have been carried out over the temperature range 300 K – 800 K by using impedance analyzer. The electrical conductivity of the sample was explained on the basis of hopping mechanism. The resistivity of the sample was found to be enchacing with the substitution of Al3+ ion for Fe3+ ion which has potential applications in microwave devices. The magnetic properties of the samole at room temperature were studied by VSM. The coercivity of the sample was found to be enchanced which enable its use as a permanent magnet.

References

  • Jonker G. H. , Philips Tech. Rev. , 18, 145 (1956).
  • Kojima H. , Fundamental properties of hexagonal ferrites with magnetoplumbite structure, in : E. P. Wohlfarth (Ed. ), Ferromagnetic Material, North- Holland Publishing Company, Amsterdam, 3, (1982).
  • F. Leceabue, R. Painzzieri, G. Albanese, G. Leo, N. Suarez, Mat. Res. Bull. 33 (1988) 266.
  • K. Haneda and H. Kojima, J. Phys. Status Solidi (A) 6 (1971) 259.
  • X. Wang, D. Li, X. Wang, J. Alloys. Compd. 273 (1996) 45.
  • D. B. Ghare, Sinha A. B. P. , J. Phys. Chem. Solids, 29 ((1968) 885.
  • K. Haneda, H. Kojima, Jap. J. Appl. Phys, 12 1973) 355.
  • S. Ounnunkad , P. Winotai , J. Magn. Magn. Mater. 301 (2006) 292.
  • S. Thompson, N. J. Shirtcliffe, E. S. O'Keefe, S. Appleton, C. C. Perry. , J. Magn. Magn. Mater. , 292 (2005) 100. 10] J. J. Went, G. W. Rathenau, E. W. Gorter, G. W. Oosterhout, V. Philips Tech. Rev. 13 (1952) 194.
  • A. Tawfik, J. Therm. analysis, 35 (1989) 141.
  • Sharad Sable, Ph. D. Thesis (2012).
  • ASM Handbook, Properties ad Selection: Nonferrous Alloys and Special-Purpose Materials, ASM International, Materials Park, OH, 2 (1990).
  • S. Ram, H. Krishan, K. N. Rai, K. A. Narayan, Jpn. J. or App. Phy. 28 (4) (1989) 604.
  • O. Kalogirou , D. Samaras, H. Vincent, Solid State Ionics, 47 (1991) 31.
  • S. G. Lee, S. J. Kwon, J. Magn. Magn. Mater. 153 (1996) 181.
  • K. Shafi, Y. Koltypin , A. Gedanken , R. Prozorov , Balogh. , J. Lendvai, I. Felner, J. Phys. Chem. 5B, 409(1997).
  • G. Benito, M. P. Morales, J. Requena, V. Raposo, M. Vazquex, J. S. Moya, JMMM 234 (2001) 645.
  • T. Chang, J. G. Zhu, J. H. Judy, J. Appl. Phy. , 73 (1993) 6715.
  • E. C. Stoner, E. W. Wolforth, Phil. Trans. Roy Soc. London, A 240 (1948) 599.
  • Relph Skomnski, Simple Models of Magnetism, March (2007).