Anisotropy and Magnetostriction in Non-Stoichiometric Cobalt Ferrite

Nlebedim, Ikenna C.; Snyder, John Evan; Moses, Anthony John; Jiles, David

doi:10.1109/tmag.2012.2200884

Cited by 49 publications

(46 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6, it can be seen that magnetic susceptibility is inversely related to magnetocrystalline anisotropy, as expected. The K 1 values obtained in this study at 300 K for all compositions are comparable to those obtained from theoretical calculations and experimental studies on un-substituted cobalt ferrite at 300 K. [21][22][23] This is because, the concentration of Zn in the samples studied here is low and consequently, a moderate variation of K 1 with composition is obtained.…”

Section: Magnetic Propertiessupporting

confidence: 86%

Temperature dependence of the structural, magnetic, and magnetostrictive properties of zinc-substituted cobalt ferrite

Nlebedim

Vinitha

Praveen

et al. 2013

Journal of Applied Physics

Self Cite

View full text Add to dashboard Cite

This study presents the effects of substitution of Zn 2+ for Co2+ at low concentrations and the effects of temperature variations on the structural, magnetic, and magnetostrictive properties ofcobalt ferrite. Although the Zn-substituted cobalt ferrite samples, Co1−x Zn xFe2O4 (x = 0.02, 0.04, 0.06, 0.09, and 0.17) did not show observable changes in crystal structure, the magnetic and magnetostrictive properties were strongly affected. The variation in magnetic susceptibilitywith composition can be related to the variations in magnetization, coercive field and magnetocrystalline anisotropy. The changes in coercive field were found to be primarily due to the variations in the magnetocrystalline anisotropy. The effect of magnetocrystalline anisotropyon magnetization was stronger at lower cation concentration than at higher concentrations. The decrease in magnetization around 150 K is attributed to the high magnetocrystalline anisotropyat low temperatures which prevented the maximum applied field of 4 MA/m from causing the saturation of magnetization in the samples. Because the magnetocrystalline anisotropy was determined with the magnetization data using the Law of Approach to saturation magnetization, the reliability of the result was found to decrease with decrease in temperature. Peak-to-peakmagnetostriction amplitude and the strain sensitivity decreased with increase in Znsubstitution. KeywordsAmes Laboratory, Zinc, Magnetic anisotropy, Ferrites, Cobalt, Magnetic fields Disciplines Electromagnetics and Photonics CommentsThe following article appeared in Journal of Applied Physics 113 (2013) This study presents the effects of substitution of Zn 2þ for Co 2þ at low concentrations and the effects of temperature variations on the structural, magnetic, and magnetostrictive properties of cobalt ferrite. Although the Zn-substituted cobalt ferrite samples, Co 1Àx Zn x Fe 2 O 4 (x ¼ 0.02, 0.04, 0.06, 0.09, and 0.17) did not show observable changes in crystal structure, the magnetic and magnetostrictive properties were strongly affected. The variation in magnetic susceptibility with composition can be related to the variations in magnetization, coercive field and magnetocrystalline anisotropy. The changes in coercive field were found to be primarily due to the variations in the magnetocrystalline anisotropy. The effect of magnetocrystalline anisotropy on magnetization was stronger at lower cation concentration than at higher concentrations. The decrease in magnetization around 150 K is attributed to the high magnetocrystalline anisotropy at low temperatures which prevented the maximum applied field of 4 MA/m from causing the saturation of magnetization in the samples. Because the magnetocrystalline anisotropy was determined with the magnetization data using the Law of Approach to saturation magnetization, the reliability of the result was found to decrease with decrease in temperature. Peak-to-peak magnetostriction amplitude and the strain sensitivity decreased with increase in Zn substitution. V C 2013 AIP Publ...

show abstract

Section: Magnetic Propertiessupporting

confidence: 86%

Temperature dependence of the structural, magnetic, and magnetostrictive properties of zinc-substituted cobalt ferrite

Nlebedim

Vinitha

Praveen

et al. 2013

Journal of Applied Physics

Self Cite

View full text Add to dashboard Cite

show abstract

“…[43] that the intensity of magnetostriction being dependent on the stress (λ S ) may change its sign at a certain value of stress, and that this value decreases when cobalt content increases. More recently, it was underlined that reported differences in literature of the magnetostrictive properties of cobalt ferrites are likely due to the different processing routes followed by different teams [52]. However, owing to the validation of our measurement method which was provided by examination of K 1 and λ S got for NiZn ferrites, we consider that λ S (and K 1 ) values got for NiZnCo ferrites produced by the processing route adopted in this study should also be correct.…”

Section: Variations Of λ S With the Zn Contentmentioning

confidence: 54%

Experimental determination of magnetocrystalline anisotropy constants and saturation magnetostriction constants of NiZn and NiZnCo ferrites intended to be used for antennas miniaturization

Mattéi

Guen

Chevalier

et al. 2015

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

“…This in turn affects magnetocrystalline anisotropy and the magnetostrictive properties. 9,10 It is seen from Fig. 3(b) changes of the sites into which Mg substitutes, the rate of substitution into the sites, and displacement of Fe and Co due to the substitution.…”

Section: Resultsmentioning

confidence: 98%

Structural, magnetic, and magnetoelastic properties of magnesium substituted cobalt ferrite

Nlebedim

Hadimani

Prozorov

et al. 2013

Journal of Applied Physics

Self Cite

View full text Add to dashboard Cite

The effects of substituting Mg on the structural, magnetic, and magnetostrictive properties ofcobalt ferrite have been investigated. Comparable values of lattice parameter were obtained for the Mg-substituted samples. Saturation magnetization continuously decreased with increase inMg concentration. Peak-to-peak magnetostriction amplitude and strain sensitivity had a similar dependence on Mg concentration. Keywords

show abstract

Anisotropy and Magnetostriction in Non-Stoichiometric Cobalt Ferrite

Cited by 49 publications

References 16 publications

Temperature dependence of the structural, magnetic, and magnetostrictive properties of zinc-substituted cobalt ferrite

Temperature dependence of the structural, magnetic, and magnetostrictive properties of zinc-substituted cobalt ferrite

Experimental determination of magnetocrystalline anisotropy constants and saturation magnetostriction constants of NiZn and NiZnCo ferrites intended to be used for antennas miniaturization

Structural, magnetic, and magnetoelastic properties of magnesium substituted cobalt ferrite

Contact Info

Product

Resources

About