Effect of Particle Size on the Structural and Magnetic Properties of Nanocrystalline Zinc Ferrite
Journal Title: STAR Journal - Year 2014, Vol 3, Issue 3
Abstract
ZnFe2O4 is one of the most important technological material having applications in radio engineering, radio technology, semiconductors, bio-medical applications etc. ZnFe2O4 when in bulk form shows paramagnetic behavior at room temperature. When ZnFe2O4 is synthesized by some techniques it was possible to see the ferromagnetic behavior. Also, ZnFe2O4 in nanocrystalline form exhibit different magnetic properties. Therefore in the present work we intend to present the properties of particle size behavior of ZnFe2O4 nanoparticles. ZnFe2O4 nanoparticles were synthesized by oxalic acid based precursor method. The obtained ZnFe2O4 nano powders were thermally annealed from 300 to 600 °C. The structural and magnetic characterization were measured using X-ray diffraction (XRD), scanning electron microscope (SEM), IR measurements and vibrating sample magnetometer (VSM). XRD patterns clearly showed the formation of zinc ferrite. The particle size was observed to increase from 19 to 35 nm with increasing annealing temperature. The lattice constants were observed to decrease with increasing particle size. The nanoparticles size were confirmed using SEM measurements. IR measurements were carried to confirm the phase formation of ZnFe2O4 nanoparticles. The Infrared spectra showed the characteristic features of vibrational bands corresponding to spinel ferrite. Room temperature ferromagnetic properties were observed for zinc ferrite having particle sizes 19 and 21 nm. For the particle size 29 and 35 nm it showed paramagnetic nature. The magnetic properties of zinc ferrite nanoparticles were observed to be dependent on the particle size.
Authors and Affiliations
Anjaneyulu T| Department of Physics, Narasaraopet Engineering College, Narasaraopet - 522 601, Andhra Pradesh, India, Raghavender A. T| Department of Electronics and Communication Engineering, Nishitha College of Engineering and Technology, Hyderabad – 501359, Andhra Pradesh, India, Department of Physics, College of Natural and Computational Sciences, Post Box No: 395, Wollega University, Nekemte, Ethiopia, Vijaya Kumar K| Department of Physics, Jawaharlal Nehru Technological University Hyderabad, College of Engineering, Nachupally (Kondagattu), Karimnagar - 505 501, Andhra Pradesh, India, Narayana Murthy P| Department of Physics, Acharya Nagarjuna University, Guntur – 522 510, A. P., India, Narendra K| Department of Physics, V.R. Siddhartha Engineering College, Vijayawada - 520 007, Andhra Pradesh, India
Keywords
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- EP ID EP9682
- DOI http://dx.doi.org/10.4314/star.v3i3.8
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