Microwave Combustion Synthesis of Silver Doped Lanthanum Ferrite Magnetic Nanoparticles

P. A. Desai; Anjali A. Athawale

doi:10.14429/dsj.63.2387

P. A. Desai University of Pune, Pune
Anjali A. Athawale Centre for Nanoscience and Quantum Systems, Pune

DOI: https://doi.org/10.14429/dsj.63.2387

Keywords: Microwave processing, electron microscopy, magnetic properties, perovskites

Abstract

Lanthanum ferrite (LaFeO3) and silver doped LaFeO3 powders were synthesized by a single step microwave combustion route using nitrates as precursors and glycine as a fuel. XRD analysis indicated the formation of cubic phase with the dopant peaks at 2θ values of 38.3°, 44.1° and 64.4° apart from the peaks corresponding to LaFeO3. As observed from the transmission electron micrographs, LaFeO3 exhibits particles with a larger size (mean size ~57 nm), significant decrease in particle size is observed for silver doped samples. The magnetic measurements reveal weak ferromagnetic nature of LaFeO3, while silver doped samples are ferromagnetic in nature. Lanthanum silver ferrite (x=0.25, A site) shows maximum coercivity (Hci=480.96G) with hysteresis loop at room temperature which is a clear sign of ferromagnetic ordering. The S shape of the curve implies the presence of domain wall movements in nanoparticles. Thermogravimetric analysis of the samples show stable behavior of the products.

Defence Science Journal, 2013, 63(3), pp.285-291, DOI:http://dx.doi.org/10.14429/dsj.63.2387

Author Biographies

P. A. Desai, University of Pune, Pune

Mr Purushottam A. Desai did his MSc in Organic Chemistry. He has been doing doctoral research under guidance of Dr (Mrs) Anjali A. Athawale. His topic of research includes synthesis and characterization of noble metal doped perovskites for catalysis applications.

Anjali A. Athawale, Centre for Nanoscience and Quantum Systems, Pune

Dr (Mrs) Anjali A. Athawale is an Associate Professor in the Department of Chemistry, university of Pune, India. She has been working on conducting polymers, metal nanoparticles, oxide–polymer nanocomposites and their applications as sensors as well as catalysts. She has published more than 80 research papers in international journals and has contributed a chapter in Encyclopedia of Sensors published by American Scientific Publishers.