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Physical, electrical and magnetic properties of nano-sized Co-Cr substituted magnesium ferrites
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10.1063/1.3676438
/content/aip/journal/jap/111/3/10.1063/1.3676438
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/3/10.1063/1.3676438

Figures

Image of FIG. 1.
FIG. 1.

XRD patterns of Mg1−xCoxCrxFe2−xO4 (x = 0.0−0.5).

Image of FIG. 2.
FIG. 2.

SEM photographs of Mg1−xCoxCrxFe2−xO4 where (a) x = 0.0 and (b) x = 0.4.

Image of FIG. 3.
FIG. 3.

(Color online) Thermal variation of normalized moment of Mg1−xCoxCrxFe2−xO4 (x = 0.0−0.5).

Image of FIG. 4.
FIG. 4.

(Color online) M-H loops of Mg1−xCoxCrxFe2−xO4 (x = 0.0−0.5).

Image of FIG. 5.
FIG. 5.

(Color online) Plot of dc-electrical resistivity of Mg1−xCoxCrxFe2−xO4 (x = 0.0−0.5) vs temperature. Inset shows Arrhenius type plot of ln ρ vs 1000/T for representative samples of Co-Cr doped magnesium ferrite.

Image of FIG. 6.
FIG. 6.

(Color online) Dielectric constant (έ) of Mg1−xCoxCrxFe2−xO4 (x = 0.0−0.5) vs ln f.

Image of FIG. 7.
FIG. 7.

(Color online) Variation of room temperature resistivity (ρ RT) and dielectric constant (ɛ′) with Co-Cr content for Mg1−xCoxCrxFe2−xO4 (x = 0.0−0.5).

Image of FIG. 8.
FIG. 8.

(Color online) Dielectric loss tangent (tan δ) of Mg1−xCoxCrxFe2−xO4 (x = 0.0−0.5) vs ln f.

Tables

Generic image for table
Table I.

Crystallite size (D), lattice constant (a), cell volume (Vcell ), X-ray density (dx ), bulk density (db ), and porosity (P) of Mg1−xCoxCrxFe2−xO4 (x = 0.0−0.5).

Generic image for table
Table II.

The observed and theoretical elemental composition values (mol L−1) of some representative samples of Mg1−xCoxCrxFe2−xO4 (x = 0.0, 0.2, and 0.4).

Generic image for table
Table III.

Curie temperature (TC ), saturation magnetization (MS ), anisotropy constant (K1 ), remanence (Mr ), coercivity (HC ), room temperature resistivity (ρRT ), activation energy (Ea ), dielectric constant (έ), and dielectric loss tangent (tan δ) at 10 kHz, of Mg1−xCoxCrxFe2−xO4 (x = 0.0-0.5).

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/content/aip/journal/jap/111/3/10.1063/1.3676438
2012-02-06
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Physical, electrical and magnetic properties of nano-sized Co-Cr substituted magnesium ferrites
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/3/10.1063/1.3676438
10.1063/1.3676438
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