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Chhaya, Urvi V.; Trivedi, Bimal S.; Kulkarni, R.G.; Somayajulu, D. R. S.

doi:10.1023/a:1006690109263

Cited by 14 publications

(3 citation statements)

References 10 publications

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“…The non-linear variation of lattice constant has been reported for the systems, which are not completely normal or inverse [14]. Similar results have been observed for the spinel systems: Mg 1þx Mn x Fe 2À2x O 4 [8], NiAl x Cr x Fe 2À2x O 4 [15] and CoCr x Fe 2À2x O 4 [16]. The non-linear variation of 'a' with x; can now be explained on the basis of distribution of cations among A-and B-sites.…”

Section: Resultssupporting

confidence: 82%

Localized canted spin behaviour in

Thummer

Chhantbar

Modi

et al. 2004

Journal of Magnetism and Magnetic Materials

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Section: Resultssupporting

confidence: 82%

Localized canted spin behaviour in

Thummer

Chhantbar

Modi

et al. 2004

Journal of Magnetism and Magnetic Materials

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“…This is an indication of a reduction in magnetic coupling J AB with Cr concentration. 34 The magnetic hyperfine values are associated with the dipolar field resulting from the deviation from cubic symmetry and also from the covalent nature of the tetrahedral bonds. The two types of interactions responsible for the hyperfine fields at the B sites are the A-B and B-B types.…”

Section: Resultsmentioning

confidence: 99%

Electrical and magnetic properties of Cr3+ substituted nanocrystalline nickel ferrite

Patange¹,

Shirsath²,

Toksha³

et al. 2009

Journal of Applied Physics

140

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The magnetic and electrical properties of Cr3+ substituted nickel ferrite synthesized by wet chemical route have been studied. Particle size measured from x-ray diffraction and from transmission electron microscopy images confirms the nanosize dimension of prepared particles. Magnetic parameters such as coercivity and saturation magnetization are measured from vibrating sample magnetometer. Magnetization, ac susceptibility, electrical resistivity, and Mössbauer measurements were carried out. Electrical properties such as ac resistivity as a function of frequency and dc resistivity as a function of temperature were studied for various Cr3+ substitutions in nickel ferrite. The dielectric properties such as dielectric constant (ε′) and dielectric loss (ε″) were also studied. The dielectric constant and dielectric loss obtained for the ferrites prepared through wet chemical route posses a value lower than that of the ceramically prepared samples of the same composition. The resistivity obtained is higher than that of ferrite prepared by ceramic method. The dc resistivity increases with Cr3+ content x. The observed variation in resistivity is explained by Verwey hopping mechanism. The activation energy derived form the temperature variation in resistivity was found to increase with increasing concentration of Cr3+ ions.

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“…The introduction of Cr 3+ ions gives rise to strong B-B interaction [2]. There are reports on the magnetic properties of Al 3+ and Cr 3+ substituted for Fe 3+ in Ni-and Li-ferrites [3][4][5][6] and garnets [7]. The structural study on Al 3+ substituted Cu-ferrites [8] has shown the absence of tetragonal distortion for lower Al content and higher B-site occupancy of Al 3+ ions.…”

Section: Introductionmentioning

confidence: 99%