A1 Refereed original research article in a scientific journal
Magnetic properties of fine SFMO particles: Superparamagnetism
Authors: Suominen T, Raittila J, Salminen T, Schlesier K, Linden J, Paturi P
Publisher: ELSEVIER SCIENCE BV
Publication year: 2007
Journal:Journal of Magnetism and Magnetic Materials
Journal name in sourceJOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Journal acronym: J MAGN MAGN MATER
Volume: 309
Issue: 2
First page : 278
Last page: 284
Number of pages: 7
ISSN: 0304-8853
DOI: https://doi.org/10.1016/j.jmmm.2006.07.016
Abstract
Magnetic properties of fine Sr2FeMoO6 (SFMO) powders were systematically studied and superparamagnetism was observed. The SFMO samples were prepared using a citrate-gel method and were characterized by X-ray diffraction (XRD), ferromagnetic resonance (FMR) and Mossbauer spectroscopy. The XRD measurements showed that the powders are nearly pure and the Rietveld refinement gave particle sizes of 31 and 197 nm and antisite disorders of 10 and 15%, respectively. The 197 nm crystallite size sample has a T-C = 415 K and a magnetic moment of 3.0 mu(B)/f.u. Several measurements made by SQUID magnetometer, FMR and Mossbauer spectroscopy showed that the 31 nm crystallite sample behaves superparamagnetically with blocking temperature T-B = 35 K and it has a reduced saturation magnetization of 1.0 mu(B)/f.u. at 5 K and effective paramagnetic moment of 3.0 mu(B). (c) 2006 Elsevier B.V. All rights reserved.
Magnetic properties of fine Sr2FeMoO6 (SFMO) powders were systematically studied and superparamagnetism was observed. The SFMO samples were prepared using a citrate-gel method and were characterized by X-ray diffraction (XRD), ferromagnetic resonance (FMR) and Mossbauer spectroscopy. The XRD measurements showed that the powders are nearly pure and the Rietveld refinement gave particle sizes of 31 and 197 nm and antisite disorders of 10 and 15%, respectively. The 197 nm crystallite size sample has a T-C = 415 K and a magnetic moment of 3.0 mu(B)/f.u. Several measurements made by SQUID magnetometer, FMR and Mossbauer spectroscopy showed that the 31 nm crystallite sample behaves superparamagnetically with blocking temperature T-B = 35 K and it has a reduced saturation magnetization of 1.0 mu(B)/f.u. at 5 K and effective paramagnetic moment of 3.0 mu(B). (c) 2006 Elsevier B.V. All rights reserved.
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