01677nas a2200229   4500008004100000022001400041245012700055210006900182260007300251300001100324490000800335520080900343653001901152653002401171653002101195653001901216653002001235653001801255100002801273700002501301856012101326       2013                        eng d  a0304-885300aInfluence of initial particle size on the magnetostriction of sintered cobalt ferrite derived from nanocrystalline powders0 aInfluence of initial particle size on the magnetostriction of si  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcNOV  a96-1020 v3463 a<p>The role of initial particle size on the magnetostriction coefficient of sintered cobalt ferrite derived from nanocrystalline powders is studied. Nanoparticles of cobalt ferrite with different sizes in the range 3-80 nm are synthesized by an autocombustion method using metal nitrates and glycine. It has been observed that the initial particle size of the starting powders has a strong influence on the magnetostrictive behavior of sintered cobalt ferrite. Highest magnetostrictive strain and strain derivative are obtained for sintered ferrite derived from nanoparticles of size &lt; 5 nm. The results show that higher magnetostriction coefficient for sintered cobalt ferrite can be achieved by compacting nanocrystalline particles of very small size. (C) 2013 Elsevier B.V. All rights reserved.</p>10aCobalt ferrite10amagnetic properties10aMagnetostriction10aMicrostructure10aNanocrystalline10aParticle size1 aMohaideen, Kamal, Khaja1 aJoy, Pattayil, Alias  uhttp://library.ncl.res.in/content/influence-initial-particle-size-magnetostriction-sintered-cobalt-ferrite-derived-002008nas a2200217   4500008004100000022001400041245014500055210006900200260009900269300001200368490000700380520113300387653001901520653002101539653001901560653002001579653001401599100002801613700002501641856012401666       2014                        eng d  a0955-221900aStudies on the effect of sintering conditions on the magnetostriction characteristics of cobalt ferrite derived from nanocrystalline powders0 aStudies on the effect of sintering conditions on the magnetostri  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcMAR  a677-6860 v343 a<p>The effect of sintering conditions on the magnetostriction characteristics of sintered cobalt ferrite derived from nanocrystalline powders is studied. It is observed that the magnetostriction coefficient as well as the slope of the magnetostriction as a function of field depends on the microstructure of the sintered product. There is a direct correlation between the magnetostriction characteristics and density as well as porosity of the sintered products. Intragranular pores are found to be strongly influencing the magnetostriction characteristics. Similarly, correlation is found between the magnetostriction parameters and the Curie temperature, indicating the role of cation distribution which affects the magnetic anisotropy. Sintering the compacts made from nanocrystalline powders at 1450 degrees C for a very short duration is found to give high values of magnetostriction coefficient. However, higher values of magnetostriction at low magnetic fields are obtained for samples sintered at lower temperatures for longer duration and having relatively lower density. (C) 2013 Elsevier Ltd. All rights reserved.</p>10aCobalt ferrite10aMagnetostriction10aMicrostructure10aNanocrystalline10aSintering1 aMohaideen, Kamal, Khaja1 aJoy, Pattayil, Alias  uhttp://library.ncl.res.in/content/studies-effect-sintering-conditions-magnetostriction-characteristics-cobalt-ferrite-0