Transport properties of Ti–Ni spinel ferrites

Eraky, M.R.; Attia, Smadar

doi:10.1016/j.physb.2015.01.011

Cited by 30 publications

(5 citation statements)

References 45 publications

(53 reference statements)

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“…The electron exchange between Fe 3+ and Fe 2+ and hole transfer Ti 3+ and Ti 4+ on the octahedral B site in ferrites are according to the Varwey mechanism [22]. The hole and electron exchange on the octahedral B site are as follows [23]. The Fe 2+ , Ti 3+ , and Co 3+ ions formed during the annealed process [24].…”

Section: Resistivitymentioning

confidence: 99%

Role of Coupling Divalent and Tetravalent Metal Ions on the Elastic and Electric Properties of CoFe2O4 Ferrites Prepared by Sol–Gel Method

Desai¹,

Pawar

Jadhav

et al. 2016

J Supercond Nov Magn

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The effect of Zn-Ti substitution on the infrared spectroscopy, elastic, dielectric, and resistivity properties of CoZn x Ti x Fe 2−2x O 4 ferrites (where x = 0.0-0.4 in steps of 0.1) is investigated in the paper. All the samples were synthesized by the sol-gel method. Infrared spectroscopy shows two major absorption bands indicating that the prepared samples are in spinel structure. Elastic properties and dielectric properties are measured at room temperature and Zn-Ti is substitution dependent. The dc resistivity is measured using a two-probe method in the temperature range 300 to 650 K. The dielectric constant decreased whereas dc resistivity increased with the Zn-Ti substitution. The elastic constant decreases with increases in Zn-Ti ions.

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Section: Resistivitymentioning

confidence: 99%

Role of Coupling Divalent and Tetravalent Metal Ions on the Elastic and Electric Properties of CoFe2O4 Ferrites Prepared by Sol–Gel Method

Desai¹,

Pawar

Jadhav

et al. 2016

J Supercond Nov Magn

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“…Ferrites Materials, such Zn ferrite, have been found very interesting for electronics devices [3][4][5]. They can be used as gas sensors, microwave devices and magneto composites [6][7][8][9]. The study of the electric and dielectric properties of these compounds is very interesting to optimize their properties.…”

Section: Introductionmentioning

confidence: 99%

Structural and electrical properties of Zn1-xNixFe2O4 ferrite

Rahmouni

Benali

Cherif

et al. 2015

Physica B: Condensed Matter

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“…The X-ray diffractograms were recorded with a Siemens D-5000 X-ray diffractometer using CoK radiation. The details of electrical and thermal measurements were reported earlier [6,7].…”

Section: Methodsmentioning

confidence: 99%

“…Where "e" is the electron charge, "c" velocity of light and L is the jump length between conduction sites calculated from the relation [7] : L =d√2/4 (3) where d is the value of lattice parameters in the three directions for hexagonal ferrite, and E H is the activated hopping energy, k B Boltzmann constant. The effect of composition on the phonon frequency at different temperatures is shown in Fig.…”

Section: Effect Of Composition and Temperature On Phonon Frequencymentioning

confidence: 99%

Structural and Transport Properties of Fine CoTi-ZnBaM Hexagonal Ferrite

2015

IJSR

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A series of polycrystalline samples of the system Ba 1-x Zn x Co x Ti x Fe 12-2x O 19 (x = 0.0, 0.2, 0.4 and 0.6) were prepared by the usual ceramic technique. X-ray diffraction, thermal conductivity, thermoelectric power, drift mobility and phonon frequency were studied for the samples. The X-ray diffraction pattern confirms the presence single phase magnetoplumbite structure of substituted M ferrite samples. The thermal conductivity and thermoelectric power were determined at different temperatures for all the samples. The thermal conductivity coefficient, k, increases with increasing temperature due to the increasing in the number of photons, whereas the decreasing in, k, with increases doping ratio may be due to the formation of anion vacancies. The thermo-electric power measurements reveal the p-type semiconducting behavior of the samples. The increasing in drift mobility with temperature indicates that the hopping of electrons between Fe 3+-Fe 2+ and holes Co 2+-Co 3+ are activated by temperature as well as its concentration. So, it is presumed here that the conduction mechanism depends on the hopping of localized charge carriers. Due to the less value of activation energy (< 0.3 e V) small polaron hopping can be ruled out from conduction process. Thermoelectric power data indicated that the band conduction theory can be participating in the conduction mechanism. The phonon frequency was estimated to have an optimum value for higher substitution, due to the increase in phonon scattering.

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Transport properties of Ti–Ni spinel ferrites

Cited by 30 publications

References 45 publications

Role of Coupling Divalent and Tetravalent Metal Ions on the Elastic and Electric Properties of CoFe2O4 Ferrites Prepared by Sol–Gel Method

Role of Coupling Divalent and Tetravalent Metal Ions on the Elastic and Electric Properties of CoFe2O4 Ferrites Prepared by Sol–Gel Method

Structural and electrical properties of Zn1-xNixFe2O4 ferrite

Structural and Transport Properties of Fine CoTi-ZnBaM Hexagonal Ferrite

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