Electric relaxation currents in high-resistivity solids

Müller, Philipp

doi:10.1002/pssa.2210670102

Cited by 61 publications

(14 citation statements)

References 68 publications

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“…The different approximations converge to the point that the initial edge of the space-charge TSDC curve coincides to that of the non-interacting rotating dipoles. 14 The relaxation time can be evaluated from the relation ͑area method͒…”

Section: Theorymentioning

confidence: 99%

Dielectric characterization of the water-matrix interaction in porous materials by thermal depolarization spectroscopy

Papathanassiou

Grammatikakis

2000

Phys. Rev. B

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We investigate the dielectric behavior of sandstone, which consists of a porous matrix with a small amount of inherent humidity, by the thermal-stimulated depolarization current technique. Nine different relaxation mechanisms are detected by the thermal sampling scheme, and are characterized. The activation energy distribution and the pre-exponential factor are obtained by analyzing the signals under the constraint of a normal distribution in the activation energy. The drying of the specimen at elevated temperature under dynamic vacuum affects some of the relaxation mechanisms. The model of freely rotating dipoles may not account for all the drying-sensitive mechanisms. It is probable that water molecules are organized in a way that provide either conductive layers over the surface of the grains or for conductive inclusions inside the bulk. Longdistance charge-transport mechanisms are also affected by the removal of the humidity.

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Section: Theorymentioning

confidence: 99%

Dielectric characterization of the water-matrix interaction in porous materials by thermal depolarization spectroscopy

Papathanassiou

Grammatikakis

2000

Phys. Rev. B

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“…The conventional theory of these phenomena usually expects that a separate current peak during a temperature scan is caused by detrapping of nonequilibrium carriers from these states. However, in [5] it was shown that a high-temperature TSDC peak can arise due to equilibrium conductivity of a material. The effect of contacts on TSPC spectra was investigated in [6].…”

Section: Introductionmentioning

confidence: 99%

“…The dependence of the total charge of the sample on the temperature (for sample parameters seeFig. 1) ' ) According to(5) the slope of the Inj(l/kT) curve is E,/2. TSDC for different heights of the anode barrier rp, : (1) rp, = 0.1,(2) 0.35, (3) 0.45 eV; rpk = 0.58 eV, E, = 0.25 eV…”

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confidence: 99%

Computer simulation of thermally stimulated depolarization currents due to charge carrier injection from contacts

Kostsova

Salman

1995

Phys. Stat. Sol. (a)

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Using computer simulation the possibility of a thermally stimulated depolarization current (TSDC) peak due to electron injection from contacts is considered. Calculations are performed for a semiconductor containing one donor level and partially blocking contacts. It is shown that electron injection from the contacts can be one of the reasons of TSDC peak inversion. The latter depends on the relations between the heights of potential barriers at cathode and anode.

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“…The surface polarization concept as a basis for the measurement and interpretation of TSC's in polar crystals is relatively new. The concept has been already employed before in one or another form for the study of various types of electronic conductors: semiconductors [23], high resistivity materials [24] and for a contactless measurement of the conductivity of semiinsulators [25]. I n these cases however, because of reasons which will become obvious in Section 2.7.4, in general only isothermal relaxation (IR) measurements are feasible.…”

Section: Introductionmentioning

confidence: 99%

Bulk conductivity, polarization, and thermally stimulated currents of insulated polar crystals

Keßler

1985

phys. stat. sol. (a)

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The inevitable space‐charge formation caused by free charge carriers in polar crystals can be described for “insulated” samples as a surface polarization caused by the bulk conductivity. This makes possible a simple quantitative description of the dc and ac isothermal relaxation and of the thermally stimulated currents summarized in this paper and compared with experimental data. It is shown that the bulk conductivity and other parameters may be obtained from the TSC data.

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Electric relaxation currents in high-resistivity solids

Cited by 61 publications

References 68 publications

Dielectric characterization of the water-matrix interaction in porous materials by thermal depolarization spectroscopy

Dielectric characterization of the water-matrix interaction in porous materials by thermal depolarization spectroscopy

Computer simulation of thermally stimulated depolarization currents due to charge carrier injection from contacts

Bulk conductivity, polarization, and thermally stimulated currents of insulated polar crystals

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