01474nas a2200241   4500008004100000022001400041245008600055210006900141260007300210300001200283490000800295520063300303653002400936653001400960653001800974653002300992653000801015100001801023700001801041700002501059700002801084856012001112       2006                        eng d  a0304-885300aSize-dependent magnetic properties of nanocrystalline yttrium iron garnet powders0 aSizedependent magnetic properties of nanocrystalline yttrium iro  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUN  a212-2190 v3013 a<p>Yttrium iron garnet (YIG) powders with particle sizes of 9, 14, 25 and 60 nm have been synthesised and their magnetic properties have been studied as a function of particle size and temperature. The particles with sizes of 9 and 14 nm exhibited superparamagnetism. The blocking temperature (T-B) decreased with decreasing particle size, whereas the anisotropy constant (K) increased. The saturation magnetisation (M-s) decreased with decreasing particle size. These variations are attributed to large surface-to-volume ratios in nanoparticles where the surface moments are predominant. (c) 2005 Published by Elsevier B.V.</p>10aanisotropy constant10aMagnetism10aNanoparticles10aSuperparamagnetism10aYIG1 aRajendran, M.1 aDeka, Sasanka1 aJoy, Pattayil, Alias1 aBhattacharya, Asish, K.  uhttps://library.ncl.res.in/content/size-dependent-magnetic-properties-nanocrystalline-yttrium-iron-garnet-powders-001416nas a2200205   4500008004100000022001400041245008100055210006900136260009500205300001400300490000600314520065400320653002200974653002000996653002301016653001701039100001801056700002501074856011101099       2008                        eng d  a1533-488000aSuperparamagnetic nanocrystalline ZnFe2O4 with a very high curie temperature0 aSuperparamagnetic nanocrystalline ZnFe2O4 with a very high curie  a25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USAbAMER SCIENTIFIC PUBLISHERScAUG  a3955-39580 v83 a<p>Studies on the magnetic properties of nanocrystalline ZnFe2O4 synthesized by an autocombustion method are reported. Superparamagnetic behavior is observed for the nanocrystalline materials with particle sizes of 8 nm and 17 nm, with superparamagnetic blocking temperatures of 65 K and 75 K, respectively. Magnetic hysteresis with very large coercivities of 533 Oe and 325 Oe, respectively, are observed at 12 K. Studies on the temperature variation of the magnetization above room temperature indicate that the Curie temperature is as high as similar to 800 K when compared to the paramagnetic nature of bulk zinc ferrite at room temperature.</p>10aCurie temperature10aNanocrystalline10aSuperparamagnetism10aZinc Ferrite1 aDeka, Sasanka1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/superparamagnetic-nanocrystalline-znfe2o4-very-high-curie-temperature-0