The electrical properties of manganese ferrite (MnFe2O4) at the Neel temperature

T.E. Whall; N. Salerno; Y.G. Proykova; V.A.M. Brabers

doi:10.1080/13642818708211227

The electrical properties of manganese ferrite (MnFe2O4) at the Neel temperature

T.E. Whall, N. Salerno, Y.G. Proykova, V.A.M. Brabers

Physics of Nanostructures

Research output: Contribution to journal › Article › Academic › peer-review

10 Citations (Scopus)

Abstract

Electrical conductivity and thermopower measurements have been made on zinc and manganese ferrous ferrite, ZnxFe3-xO4 and MnxFe3 -xO4 with 0 = X <1, in the temperature range 100–300 K. The results for X <0.5 are tentatively interpreted in terms of the formation of a Coulomb gap at low temperatures in an energy band of localized states. For X = 0.5 the electrical conductivity is symptomatic of nearest-neighbour hopping, and the thermopower varies as In c where c=(1 - X)/2. The energy bandwidth of conduction states has been extracted from the thermopower and electrical conductivity data and is shown to be roughly proportional to the standard deviation of the Zn and Mn distributions [X(1 - X)1/2. A polaron contribution to the conductivity activation energy of approximately 0.03 eV at room temperature has been deduced for Mn0.8Fe2.2O4 and Mn0.8Fe2.1O4.

Original language	English
Pages (from-to)	99-105
Journal	Philosophical Magazine B : physics of condensed matter, statistical mechanics, electronic, optical and magnetic properties
Volume	56
Issue number	1
DOIs	https://doi.org/10.1080/13642818708211227
Publication status	Published - 1987

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title = "The electrical properties of manganese ferrite (MnFe2O4) at the Neel temperature",

abstract = "Electrical conductivity and thermopower measurements have been made on zinc and manganese ferrous ferrite, ZnxFe3-xO4 and MnxFe3 -xO4 with 0 = X <1, in the temperature range 100–300 K. The results for X <0.5 are tentatively interpreted in terms of the formation of a Coulomb gap at low temperatures in an energy band of localized states. For X = 0.5 the electrical conductivity is symptomatic of nearest-neighbour hopping, and the thermopower varies as In c where c=(1 - X)/2. The energy bandwidth of conduction states has been extracted from the thermopower and electrical conductivity data and is shown to be roughly proportional to the standard deviation of the Zn and Mn distributions [X(1 - X)1/2. A polaron contribution to the conductivity activation energy of approximately 0.03 eV at room temperature has been deduced for Mn0.8Fe2.2O4 and Mn0.8Fe2.1O4.",

author = "T.E. Whall and N. Salerno and Y.G. Proykova and V.A.M. Brabers",

year = "1987",

doi = "10.1080/13642818708211227",

language = "English",

volume = "56",

pages = "99--105",

journal = "Philosophical Magazine B : physics of condensed matter, statistical mechanics, electronic, optical and magnetic properties",

issn = "1364-2812",

publisher = "Taylor and Francis Ltd.",

number = "1",

}

The electrical properties of manganese ferrite (MnFe2O4) at the Neel temperature. / Whall, T.E.; Salerno, N.; Proykova, Y.G.; Brabers, V.A.M.

In: Philosophical Magazine B : physics of condensed matter, statistical mechanics, electronic, optical and magnetic properties, Vol. 56, No. 1, 1987, p. 99-105.

Research output: Contribution to journal › Article › Academic › peer-review

TY - JOUR

T1 - The electrical properties of manganese ferrite (MnFe2O4) at the Neel temperature

AU - Whall, T.E.

AU - Salerno, N.

AU - Proykova, Y.G.

AU - Brabers, V.A.M.

PY - 1987

Y1 - 1987

N2 - Electrical conductivity and thermopower measurements have been made on zinc and manganese ferrous ferrite, ZnxFe3-xO4 and MnxFe3 -xO4 with 0 = X <1, in the temperature range 100–300 K. The results for X <0.5 are tentatively interpreted in terms of the formation of a Coulomb gap at low temperatures in an energy band of localized states. For X = 0.5 the electrical conductivity is symptomatic of nearest-neighbour hopping, and the thermopower varies as In c where c=(1 - X)/2. The energy bandwidth of conduction states has been extracted from the thermopower and electrical conductivity data and is shown to be roughly proportional to the standard deviation of the Zn and Mn distributions [X(1 - X)1/2. A polaron contribution to the conductivity activation energy of approximately 0.03 eV at room temperature has been deduced for Mn0.8Fe2.2O4 and Mn0.8Fe2.1O4.

AB - Electrical conductivity and thermopower measurements have been made on zinc and manganese ferrous ferrite, ZnxFe3-xO4 and MnxFe3 -xO4 with 0 = X <1, in the temperature range 100–300 K. The results for X <0.5 are tentatively interpreted in terms of the formation of a Coulomb gap at low temperatures in an energy band of localized states. For X = 0.5 the electrical conductivity is symptomatic of nearest-neighbour hopping, and the thermopower varies as In c where c=(1 - X)/2. The energy bandwidth of conduction states has been extracted from the thermopower and electrical conductivity data and is shown to be roughly proportional to the standard deviation of the Zn and Mn distributions [X(1 - X)1/2. A polaron contribution to the conductivity activation energy of approximately 0.03 eV at room temperature has been deduced for Mn0.8Fe2.2O4 and Mn0.8Fe2.1O4.

U2 - 10.1080/13642818708211227

DO - 10.1080/13642818708211227

M3 - Article

VL - 56

SP - 99

EP - 105

JO - Philosophical Magazine B : physics of condensed matter, statistical mechanics, electronic, optical and magnetic properties

JF - Philosophical Magazine B : physics of condensed matter, statistical mechanics, electronic, optical and magnetic properties

SN - 1364-2812

IS - 1

ER -