Mechanism of electrical conductivity in Nickel-Iron Ferrite

Author

Jefferson, Clinton F. ; Baker, C. Kenneth

Author_Institution

National Bureau of Standards, Boulder, Colo

Volume

Issue

fYear

1968

fDate

9/1/1968 12:00:00 AM

Firstpage

460

Lastpage

464

Abstract

Measurements of the frequency dependence of the dielectric conductivity, Hall mobility, and thermal EMF as a function of temperature on polycrystalline Ni0.6Fe0.4Fe2O4indicate that these data can be interpreted in terms of the band model. Previous analyses of the semiconductor properties of ferrites according to the hopping model assume that the number of carriers $n$ is identical with the concentration of divalent iron ions. Hall measurements indicate that this is not the case here, and that $n$ is best described by the equation $n^{2} = (N_{D}-n)N_{0}[frac{m*}{m}]^{3/2} g^{-1} \\exp (frac{-E_{D}}{kT})$ . Assigning a value of 2 to $g , m*/m$ is 9.3, and EDis 0.034 eV.

Keywords

Conductivity; Nickel-iron ferrites; Conductivity measurement; Dielectric measurements; Equations; Ferrites; Frequency dependence; Frequency measurement; Hall effect; Iron; Temperature dependence; Thermal conductivity;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1968.1066240

Filename

1066240

Link To Document

https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1037317