@conference { ISI:000227460600023,
	title = {Magnetic properties of nanosized ferrite powders synthesized by microwave-hydrothermal method},
	booktitle = {Ninth International Conference on Ferrites (ICF-9)},
	year = {2005},
	note = {9th International Conference on Ferrites (ICF-9), San Francisco, CA, AUG 22-27, 2004},
	month = {AUG},
	pages = {143-148},
	publisher = {Amer Ceramic Soc, 735 Ceramic Place, Westerville, OH 43081-8720 USA},
	organization = {Amer Ceramic Soc, 735 Ceramic Place, Westerville, OH 43081-8720 USA},
	address = {San Francisco, CA},
	abstract = {<p>Nanosized powders of Fe3O4 and MgFe2O4 are synthesized by microwave-hydrothermal (MH) method. The ferrite powders thus obtained are characterized by powder X-ray diffraction, Mossbauer spectroscopy, scanning and transmission electron microscopies, vibrating sample magnetometer and AC magnetic susceptibility studies. Stoichiometric, nanosized (similar to 34 nm) Fe3O4 particles, having cubic symmetry with a(0) approximate to 8.39 angstrom, are obtained when molar ratio of Fe/NaOH used for the synthesis is 0.133. On the other hand, non-stoichiometric Fe3O4 is obtained when Fe/NaOH molar ratio is increased to 0.4. Though the powder XRD patterns of both stoichiometric and non-stoichiometric Fe3O4 are identical, Mossbauer spectroscopic studies showed different features in terms of asymmetry, intensity, isomer shift, etc. Saturation magnetization, M-s = 70 emu/g and coercivity, H-c = 178 Oe, at room temperature, are obtained for stoichiometric Fe3O4 powders. In the case of MgFe2O4, spherical, nanosized (similar to 3 nm) powders with cubic symmetry (a(0) approximate to 8.30 angstrom) and having very narrow size distribution are obtained under the MH conditions. The temperature and field dependent magnetic measurements on MgFe2O4 powders confirmed the existence of superparamagnetic state in this material with a superparamagnetic blocking temperature of 38 K below which typical magnetic hysteresis behaviour is observed.</p>},
	isbn = {1-57498-218-4},
	author = {Khollam, Y. B. and Dhage, S. R. and Verma, S. and Potdar, H. S. and Deshpande, S. B. and Joy, Pattayil Alias and Date, Sadgopal K.},
	editor = {Soohoo, R. F.}
}
@article { ISI:000258965100011,
	title = {Mossbauer spectroscopic investigations of nanophase iron oxides synthesized by thermal plasma route},
	journal = {Materials Characterization},
	volume = {59},
	number = {9},
	year = {2008},
	month = {SEP},
	pages = {1215-1220},
	publisher = {ELSEVIER SCIENCE INC},
	address = {360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA},
	abstract = {<p>Magnetic nanoparticles of iron oxide were synthesized by transferred arc plasma induced gas phase condensation method. Structural, morphological and magnetic studies of the as synthesized powder were carried out using X-ray diffraction, transmission electron microscopy and Mossbauer spectroscopy. These studies have revealed the simultaneous nucleation and condensation of different magnetic phases with a broad size distribution of the nanoparticles which is peaked at 30-50 nm and ranges from 10 nm to 80 nm. 57 Fe Mossbauer spectra recorded at various temperatures (5 K-300 K) in presence of external magnetic field (at 5 K) have suggested the presence of different phases of iron oxide with sizable amounts of gamma-Fe2O3 and alpha-Fe2O3 in addition to Fe3O4. The relative concentrations of these phases have been obtained by a self consistent spectral area analysis and were found to be 44:22:34 (\%). (C) 2007 Elsevier Inc. All rights reserved.</p>},
	keywords = {iron oxides, Mossbauer spectroscopy, phase analysis, plasma synthesis},
	issn = {1044-5803},
	doi = {10.1016/j.matchar.2007.10.003},
	author = {Nagar, Harshada and Kulkarni, Naveen V. and Karmakar, Soumen and Sahoo, B. and Banerjee, Indrani and Chaudhari, P. S. and Pasricha, R. and Das, A. K. and Bhoraskar, S. V. and Date, Sadgopal K. and Keune, W.}
}
