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Effect of the external fields on the polar and dielectric properties of
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10.1063/1.3291122
/content/aip/journal/jap/107/2/10.1063/1.3291122
http://aip.metastore.ingenta.com/content/aip/journal/jap/107/2/10.1063/1.3291122
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Current density measured in a heating run, after cooling the sample from 300 to 7 K, at various fixed dc polarizing electric fields, using a heating rate of 2 K/min. (b) Maximum of the current density and the maximum current density temperature of anomaly I as a function of the electric field.

Image of FIG. 2.
FIG. 2.

measured at various fixed temperature heating rates, after cooling the sample with a polarizing applied electric field of 5.6 kV/cm.

Image of FIG. 3.
FIG. 3.

Equilibrium polarization , activation energy (U), and relaxation time at infinite temperatures concerning the dipolar relaxation, associated with the anomaly I, as a function of the polarizing electric field E.

Image of FIG. 4.
FIG. 4.

(a) Current density as a function of the temperature, measured in heating run (heating rate 2 K/min) after cooling the sample with a polarizing electric field of 5.6 kV/cm between 40 and 7 K. (b) Current density as a function of the temperature, measured in a cooling run from 40 to 7 K (curve I), and in a heating run from 7 to 150 K (curve II), with a rate of 2 K/min, after cooling the sample from 150 to 40 K, under an electric field of 5.6 kV/cm.

Image of FIG. 5.
FIG. 5.

(a) Current density as a function of the temperature, measured in heating run (heating rate 2 K/min), after cooling the sample with different applied electric fields from 40 down to 10K. (b) Electric polarization obtained from the time integration of the current density presented in (a), for the different polarizing electric fields. (c) The real part and imaginary part of the dielectric constant at 100 kHz, measured in a heating run.

Image of FIG. 6.
FIG. 6.

Temperature dependence of the real part of the complex dielectric constant, measured at 100 kHz, for different selected magnetic fields, from 0.16 up to 8 kOe.

Image of FIG. 7.
FIG. 7.

The magnetic field dependence of the real part of the complex dielectric constant for different fixed temperatures.

Image of FIG. 8.
FIG. 8.

The magnetic field dependence of the imaginary part of the complex dielectric constant for different fixed temperatures.

Image of FIG. 9.
FIG. 9.

Relative field-induced variation of , calculated from Eq. (1).

Image of FIG. 10.
FIG. 10.

Temperature dependence of measured at various magnetic field strengths. The magnetic field increases from –15 to 0 kOe.

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/content/aip/journal/jap/107/2/10.1063/1.3291122
2010-01-28
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of the external fields on the polar and dielectric properties of Eu0.8Y0.2MnO3
http://aip.metastore.ingenta.com/content/aip/journal/jap/107/2/10.1063/1.3291122
10.1063/1.3291122
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