01322nas a2200217   4500008004100000022001400041245009700055210006900152260010600221300001200327490000800339520049000347653002700837653002400864653001700888100001600905700001900921700001700940700002500957856012200982       2007                        eng d  a0038-109800aDirect comparison of the aging and memory effects of magnetic nanoclusters and nanoparticles0 aDirect comparison of the aging and memory effects of magnetic na  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcFEB  a307-3100 v1413 a<p>The magnetic characteristics of a dense magnetic nanoparticle system and a spin glass system consisting of magnetic nanoclusters are compared. Zero field cooled and field cooled magnetization measurements, including aging and memory experiments, of the nanoparticle and the magnetic cluster systems show similar characteristics, suggesting a common origin for the spin glass-type behavior of the magnetic nanoparticle and nanocluster systems. (C) 2006 Published by Elsevier Ltd.</p>10aMagnetic nanoparticles10amagnetic properties10aspin glasses1 aSankar, Raj1 aVijayanand, S.1 aVerma, Seema1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/direct-comparison-aging-and-memory-effects-magnetic-nanoclusters-and-nanoparticles01727nas 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-0