Abstract
Nano-particles of Ni0.8Cu0.2Fe2O4 have been synthesized by the co-precipitation method. Langevin function fitting of the superparamagnetic M–H curve at 290 K provides a lognormal distribution with median diameter of 30 Å and standard deviation of 0.4. Outside a core of ordered spins, moments in the surface layer are disordered. Magnetization evolves over a long period of time t going linearly with log t. Magnetic anisotropy which was estimated by fitting the M-log t curve shows many fold increase over that of bulk particle sample. Major contribution to this enhancement comes form the disordered surface spins.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Morrish A. H. and Haneda K. H., J. Appl. Phys. 52 (1981), 2496.
Lin D., Numes A. C., Majkrzak C. F. and Berkowitz A. E., J. Magn. Magn. Mater. 145 (1995), 343.
Jonsson T., Svedlindh P. and Nordblad P., J. Magn. Magn. Mater. 140–144 (1995), 401.
Chantrell R. W., Coverdale G. N., El-Hilo M. and O’Grady K., J. Magn. Magn. Mater. 157 (1996), 250.
Dorman J. L. and Fiorani D. (ed.), In: Magnetic Properties of Fine Particles, North Holland, Amsterdam, 1992.
Dorman J. L., Fiorani D. and Tronc E., In: Prigogine and Rice S. A. (eds.), Advanced Chemical Physics, Vol. XCVVII, Wiley, New York, 1997.
Been C. P. and Livingston T. D., J. Appl. Phys. 30 (1995), 120S.
Leslie-Pelecky D. L. and Rieke R. D., Chem. Mater. 8 (1996), 1770.
Martinez B., Obradors X., Balcells L., Rouanet A. and Monty C., Phys. Rev. Lett. 80 (1998), 181.
Sun S. and Murray C. B., J. Appl. Phys. 85 (1999), 4325.
Raj K., Moskowitz R. and Casciari R., J. Magn. Magn. Mater. 149 (1995), 174.
McMichael R. D., Shull R. D., Swartzendruber L. J. and Bennett L. H., J. Magn. Magn. Mater. 111 (1992), 29.
Upadhayay R. V. and Mehta R. V., Pramana-J. Phys. 41 (1993), 429.
Manjura Hoque S., Amanullah Choudhury M. and Islam F., J. Magn. Magn. Mater. 251 (2002), 292.
Cullity B. D. (ed.), In: Elements of X-ray Diffraction, Addition Wesley, Reading, Mass., 1959, p. 132.
Chander S., Kumar S., Krishnamurthy A., Srivastava, B. K. and Aswal V. K., Pramana-J. Phys. 61(3) (2003), 617.
Kodama R. H. and Beronitz A. E., Phys. Rev. B29 (1999), 632.
Rondinone A. J., Samia A. C. S., Zhang Z. J., J. Phys. Chem. B103 (1999), 6876.
Chikazumi S. (ed.), In: Physics of Magnetism, Robert E. Kreiger Publ. Co., Florida, 1978.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2005 Springer
About this paper
Cite this paper
Dolia, S.N., Jain, S.K. (2005). Magnetic Behaviour of Nano-Particles of Ni0.8Cu0.2Fe2O4 . In: Somayajulu, D.R.S., Lieb, K.P. (eds) IWNMS 2004. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-29194-6_20
Download citation
DOI: https://doi.org/10.1007/3-540-29194-6_20
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-29193-0
Online ISBN: 978-3-540-29194-7
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)