01727nas a2200229   4500008004100000022001400041245011400055210006900169260007400238300001100312490000800323520088300331653001201214653002401226653002701250653001801277100001501295700001901310700001801329700002501347856012501372       2008                        eng d  a0304-384300aMagnetic and Mossbauer spectroscopic studies of NiZn ferrite nanoparticles synthesized by a combustion method0 aMagnetic and Mossbauer spectroscopic studies of NiZn ferrite nan  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcAPR  a99-1070 v1833 a<p>The properties of nanocrystalline Ni(0.5)Zn(0.5)Fe(2)O(4) synthesized by an auto-combustion method have been investigated by magnetic measurements and Mossbauer spectroscopy. The as-synthesized single phase nanosized ferrite powder is annealed at different temperatures in the range 673-1,273 K to obtain nanoparticles of different sizes. The powders are characterized by powder X-ray diffraction, vibrating sample magnetometer, transmission electron microscopy and Mossbauer spectroscopy. The as-synthesized powder with average particle size of similar to 9 nm is superparamagnetic. Magnetic transition temperature increases up to 665 K for the nanosized powder as compared to the transition temperature of 548 K for the bulk ferrite. This has been confirmed as due to the abnormal cation distribution, as evidenced from room temperature Mossbauer spectroscopic studies.</p>10aFerrite10amagnetic properties10aMossbauer spectroscopy10aNanoparticles1 aSreeja, V.1 aVijayanand, S.1 aDeka, Sasanka1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/magnetic-and-mossbauer-spectroscopic-studies-nizn-ferrite-nanoparticles-synthesized-001912nas a2200217   4500008004100000022001400041245012300055210006900178260013200247300001200379490000600391520102900397653002001426653002601446653002401472653001401496653001801510100001501528700002501543856012601568       2011                        eng d  a1475-743500aEffect of inter-particle interactions on the magnetic properties of magnetite nanoparticles after coating with dextran0 aEffect of interparticle interactions on the magnetic properties   aWORLD TRADE CENTER BLDG, 29 ROUTE DE PRE-BOIS, CASE POSTALE 896, CH-1215 GENEVA, SWITZERLANDbINDERSCIENCE ENTERPRISES LTDcJAN  a907-9150 v83 a<p>Nanoparticles of magnetite (Fe3O4) are synthesised by a coprecipitation method and coated with the biocompatible polymer, dextran. The uncoated and dextran coated magnetite nanoparticles are characterised by powder X-ray diffraction, infrared spectroscopy, transmission electron microscopy, and magnetic measurements. The magnetic properties of the uncoated and coated magnetite nanoparticles are compared to study the effect of inter-particle magnetic interactions on the magnetic characteristics. Absence of magnetic hysteresis at room temperature indicates the superparamagnetic nature of the two samples. Evidence for the effect of reduced inter-particle magnetic interactions is directly obtained from the field dependence of magnetisation at room temperature. The decreased superparamagnetic blocking temperature and the nature and shape of the field cooled magnetisation curve of the dextran coated sample further confirmed that the inter-particle magnetic interactions are completely suppressed after coating.</p>10adextran coating10amagnetic interactions10amagnetic properties10amagnetite10aNanoparticles1 aSreeja, V.1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/effect-inter-particle-interactions-magnetic-properties-magnetite-nanoparticles-after-0