01950nas a2200169 4500008004100000022001400041245006800055210006600123260008300189300001100272490000700283520132800290100002301618700002401641700002501665856009001690 2005 eng d a1098-012100aEffect of disorder on the magnetic properties of LaMn0.5Fe0.5O30 aEffect of disorder on the magnetic properties of LaMn05Fe05O3 aONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USAbAMERICAN PHYSICAL SOCcAUG a0544260 v723 a

Polycrystalline LaMn0.5Fe0.5O3 is synthesized by a low-temperature method and the magnetic properties of the resulting powder have been studied after annealing the sample in air at different temperatures in the range 200 degrees C-1350 degrees C. Room temperature Mossbauer spectroscopic studies show that the Fe ions are present in the +3 oxidation state in the material. However, the magnetic properties vary widely in an unexpected manner when samples are annealed at different temperatures. Zero field cooled magnetization studies show a cusp below 100 K, for the sample annealed at 200 degrees C, indicating a spin-glass-like or superparamagnetic behavior. However, this cusp disappears completely when the sample is annealed at 700 degrees C but still showing a magnetic hysteresis loop with reduced magnetization at low temperatures. The cusp again appears when the sample is annealed at higher temperatures with increasing low-temperature magnetization. EPR and IR spectroscopic studies indicate changes in the distribution of Mn3+ and Fe3+ ions in the lattice. The overall results can be explained in terms of random distribution of Mn3+ and Fe3+ ions in the lattice and formation of some magnetic clusters, with the degree of distribution of the ions varying for samples annealed at different temperatures.

1 aBhame, Shekhar, D.1 aJoly, V., L. Joseph1 aJoy, Pattayil, Alias uhttps://library.ncl.res.in/content/effect-disorder-magnetic-properties-lamn05fe05o3-101350nas a2200157 4500008004100000022001400041245008700055210006900142260012500211300002300336490000700359520065900366100002301025700002501048856011901073 2006 eng d a0021-897900aEnhanced magnetostrictive properties of Mn substituted cobalt ferrite Co1.2Fe1.8O40 aEnhanced magnetostrictive properties of Mn substituted cobalt fe aCIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USAbAMER INST PHYSICScAPR aArticle No. 1079010 v993 a

The effect of substitution of Fe and Co by Mn on the magnetostrictive properties of the cobalt ferrite Co1.2Fe1.8O4 has been studied and compared. The studies on Co1.2-xMnxFe1.8O4 and Co1.2Fe1.8-xMnxO4 (0 <= x <= 0.4) showed a marked dependence of magnetostriction on the substitution of both Fe and Co by Mn. Higher magnetostriction is obtained for the substitution of Co by Mn whereas the magnetostriction is reduced substantially on the substitution of Fe by Mn. Higher magnetostriction at low magnetic fields and enhancement of the strain ratio have been observed for the substitution of Co by Mn. (c) 2006 American Institute of Physics.

1 aBhame, Shekhar, D.1 aJoy, Pattayil, Alias uhttps://library.ncl.res.in/content/enhanced-magnetostrictive-properties-mn-substituted-cobalt-ferrite-co12fe18o4-101417nas a2200157 4500008004100000022001400041245010700055210006900162260008100231300001400312490000700326520074700333100002301080700002501103856013101128 2008 eng d a0002-782000aEffect of sintering conditions and microstructure on the magnetostrictive properties of cobalt ferrite0 aEffect of sintering conditions and microstructure on the magneto a9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLANDbBLACKWELL PUBLISHINGcJUN a1976-19800 v913 a

The effects of sintering temperature and dwell time on the magnetostrictive properties of polycrystalline cobalt ferrite synthesized by the conventional ceramic method have been investigated. The present study showed that the magnitude of magnetostriction strongly depends on the microstructure of the final sintered product. The presence of small and uniform grains with less porous structure in the sintered material leads to enhancement of the magnetostrictive strain. Higher magnetostriction is obtained for samples sintered at a relatively lower temperature of 1100 degrees C. These results are further corroborated by analyzing the effect of some additives during sintering on the microstructural and magnetostrictive properties.

1 aBhame, Shekhar, D.1 aJoy, Pattayil, Alias uhttps://library.ncl.res.in/content/effect-sintering-conditions-and-microstructure-magnetostrictive-properties-cobalt-ferrite-001452nas a2200157 4500008004100000022001400041245008000055210006900135260000800204300001200212490000800224520091100232100002301143700001601166856011201182 2018 eng d a0304-885300aEnhanced strain sensitivity in magnetostrictive spinel ferrite Co1-xZnxFe2O0 aEnhanced strain sensitivity in magnetostrictive spinel ferrite C cFEB a150-1540 v4473 a

We report the magnetic and magnetoelastic properties of spinel oxide system Co1-xZnxFe2O4 (CZF series) where x = 0.0, 0.1, 0.2, 0.3, 0.4, and 0.5. All the composition were prepared by conventional solid state synthesis method and exhibited pure spinel phase formation. The lattice parameters showed gradual increase indicating uniform distribution Zn ions in cobalt ferrite lattice. The magnetic properties such as saturation magnetization and coercive field were drastically affected with Zn substitution showing enhanced saturation magnetization and a sharp decrease in the coercivity. The room temperature magnetostrictive properties showed a promising 30% enhancement in the slope of magnetostriction curve for x = 0.2 composition and a reasonable magnetostrictive strain of 110 ppm indicating its suitability as a promising magnetostrictive material. (c) 2017 Elsevier B.V. All rights reserved.

1 aBhame, Shekhar, D.1 aJoy, P., A. uhttps://library.ncl.res.in/content/enhanced-strain-sensitivity-magnetostrictive-spinel-ferrite-co1-xznxfe2o