Structural and electrical properties of nanocrystalline cobalt substituted nickel zinc ferrite

Mallapur, M.M.; Shaikh, Parvez A.; Kambale, Rahul C.; Jamadar, H.V.; Mahamuni, P.U.; Chougule, B.K.

doi:10.1016/j.jallcom.2009.01.142

Cited by 81 publications

(32 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FTIR spectra confirmed the formation of spinel cubic structure and the strong absorption bands with two characteristic peaks [21][22][23][24]. In ferrites the metal ions are situated at two sublattices named tetrahedral (A) site and octahedral (B) site.…”

Section: Ftir Studymentioning

confidence: 71%

Dielectric Response of Nix Zn1-x Al Fe O4 Nanoferrites

Donta¹,

Katrapally²,

Pendyala³

2016

NanoWorld J

View full text Add to dashboard Cite

Ni-Zn-Al nanoferrites of general formula Ni x Zn 1-x Al Fe O 4 (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) were synthesized by sol-gel auto combustion technique. The X-ray diffraction and FTIR studies confirmed the formation of single cubic spinel structure. Dielectric performance and AC conductivity of prepared mixed nanoferrites were carried out using LCR impedance meter. It was observed that both dielectric constant and dielectric loss were decreased by increasing the frequency whereas AC conductivity increases with applied frequency but decreases with increasing the Ni 2+ ion substitution for a fixed Al 3+ ion concentration. DC resistivity, activation energy and Curie temperature were calculated by using the two probe experimental method. It was observed that DC resistivity decreased whereas the charge mobility increased with increasing the temperature. DC resistivity and activation energy of the nanoferrite samples were increased with Ni 2+ ion substitution for a fixed Al 3+ ion concentration.

show abstract

Section: Ftir Studymentioning

confidence: 71%

Dielectric Response of Nix Zn1-x Al Fe O4 Nanoferrites

Donta¹,

Katrapally²,

Pendyala³

2016

NanoWorld J

View full text Add to dashboard Cite

show abstract

“…The crystal structure of Ni-Zn ferrites spinel configuration is based on a face centered cubic lattice of oxygen ions. The unit cell consists of eight formula units of the type [ZnFe 1−x ] A [Ni 1−x Fe 1+x ] B O 4 , where A represents tetrahedral site and B octahedral site [9].…”

Section: Introductionmentioning

confidence: 99%

Structure and magnetic properties of NixZn1−xFe2O4 nanoparticles prepared through co-precipitation method

Rashad

Elsayed

Moharam

et al. 2009

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…Verwey [2] suggested the hopping motion of electrons between Fe 2+ and Fe 3+ over octahedral site as a mechanism of conduction in ferrite. Ferrites are semiconductors, their electrical resistivity ( ) decreases with increase in temperature according to the relation = 0 exp( E/KT) [3,4], where E is the activation energy, 0 is the temperature independent constant and K is Boltzman's constant. de Lau and Stuijts [5] have studied chemical composition and high frequency properties of (Ni 0.8 Zn 0.2 ) 0.97−x Co 0.03 Fe 2 O 4+ where x varied from 0.22 (excess Fe 3+ ) to −0.08 (deficiency of Fe 3+ ).They have observed that in iron excess composition, x > 0.00, contain only small amounts of Fe 2+ ions.…”

Section: Introductionmentioning

confidence: 99%