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<p>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.</p>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<p>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 &lt;= x &lt;= 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.</p>1 aBhame, Shekhar, D.1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/enhanced-magnetostrictive-properties-mn-substituted-cobalt-ferrite-co12fe18o4-101256nas a2200157   4500008004100000022001400041245008300055210006900138260012500207300001100332490000800343520059600351100002300947700002500970856010300995       2006                        eng d  a0021-897900aTuning of the magnetostrictive properties of CoFe2O4 by Mn substitution for Co0 aTuning of the magnetostrictive properties of CoFe2O4 by Mn subst  aCIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USAbAMER INST PHYSICScDEC  a1139110 v1003 a<p>Marked changes in the magnetostriction of CoFe2O4 in the substitution of Mn for Co has been observed. The magnetostriction parallel to the applied field direction decreases with increasing Mn content, whereas the magnetostriction perpendicular to the field showed a marked increase for 10% of the Mn substitution. The observed magnetostrictive properties are correlated with the magnetic properties. The results suggest the possibility of tuning the magnetostrictive properties of cobalt ferrite for various applications by proper substitution. (c) 2006 American Institute of Physics.</p>1 aBhame, Shekhar, D.1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/tuning-magnetostrictive-properties-cofe2o4-mn-substitution-co-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<p>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.</p>1 aBhame, Shekhar, D.1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/effect-sintering-conditions-and-microstructure-magnetostrictive-properties-cobalt-ferrite-001230nas a2200145   4500008004100000245006800041210006800109260000800177300001200185490000800197520073100205100002300936700002500959856010000984       2017                        eng d00aMagnetoelastic properties of terbium substituted cobalt ferrite0 aMagnetoelastic properties of terbium substituted cobalt ferrite  cOCT  a465-4690 v6853 aThe magnetic properties of terbium substituted cobalt ferrites CoFe(2-x)TbxO(4) (x = 0, 0.05, 0.1, 0.15 and 0.2) prepared by conventional solid state method are studied. The coercivity showed marked increase up to x = 0.1 and saturation magnetization decreased with increasing terbium content. Magnetostriction measurements did not show much decrease in the maximum value of strain but significant increase in the slope of magnetostriction was observed for x = 0.15 with moderate magnetostriction of around 144 ppm. The observed magnetic and magnetostrictive properties can be explained on the basis of structural and microstructural changes arising because of terbium substitution. (C) 2017 Elsevier B.V. All rights reserved.1 aBhame, Shekhar, D.1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/magnetoelastic-properties-terbium-substituted-cobalt-ferrite01452nas 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<p>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.</p>1 aBhame, Shekhar, D.1 aJoy, P., A.  uhttps://library.ncl.res.in/content/enhanced-strain-sensitivity-magnetostrictive-spinel-ferrite-co1-xznxfe2o01634nas a2200229   4500008004100000022001400041245007600055210006900131260000800200300001200208490000700220520091200227653001201139653002401151653002101175653001001196653001901206100002301225700002601248700002201274856010801296       2021                        eng d  a1949-307X00aMagnetic and magnetoelastic properties of Ni-substituted cobalt ferrite0 aMagnetic and magnetoelastic properties of Nisubstituted cobalt f  cJAN  a25042050 v123 aIn this letter, magnetic and magnetostriction studies were performed on spinel ferrite Co1-xNixFe2O4 (CNF series) with 0.0 < x < 0.5. All the samples were synthesized by the conventional ceramic method and confirmed to be forming pure spinel phase. The unit cell parameter showed gradual decrease with increasing Ni content. A linear decrease in saturation magnetization (M-s) and coercivity (H-c) was observed with increasing Ni substitution, which could be attributed to reduced magneto-crystalline anisotropy. The room temperature magnetostriction studies revealed a slow decrease in maximum magnetostriction, and interestingly, for 20% reduction of cobalt concentration, i.e., for x = 0.2, a magnetostrictive strain of -164 ppm and substantially high stress sensitivity of -56 x 10(-6) A(-1) m were observed, making Co0.8Ni0.2Fe2O4 suitable for application as a magnetostrictive stress-sensing material.10aFerrite10aMagnetism in solids10aMagnetostriction10aoxide10astress sensing1 aBhame, Shekhar, D.1 aShirolkar, Mandar, M.1 aJoy, Pattayil, A.  uhttps://library.ncl.res.in/content/magnetic-and-magnetoelastic-properties-ni-substituted-cobalt-ferrite