Results 251 to 260 of about 36,009 (310)

Dielectric Relaxation in Polycrystalline Ferrites

Physica Status Solidi (a), 1981
The permittivity and conductivity of polycrystalline ferrites with composition Mn0.5Zn0.5Fe2O4 are investigated at temperatures from 20 to 150 °C and at frequencies from 200 Hz to 30 MHz. The dc conductivity shows the properties of the grain boundary surface. The conductivity of the basic material can be obtained at high frequencies.
V. P. Miroshkin, Ya. I. Panova, V. V. Passynkov   +2 more
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Dielectric relaxation time spectroscopy

IEEE Transactions on Biomedical Engineering, 2000
A new mathematical method is developed to recover the permittivity relaxation spectrum of living tissue from measurements of the real and imaginary parts of the impedance. Aiming to derive information about electrical properties of living tissue without the prior selection of any impedance model, the procedure calculates the relaxation time ...
Kevin Paulson, Svetlana Jouravleva, Chris N. McLeod   +2 more
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Dielectric Relaxation Processes in Ethanol

Nature, 1953
THE existence of secondary regions of dielectric dispersion for a number of polar liquids has been inferred by several workers from radio-frequency and microwave dispersion data, as these extrapolate at high frequencies to values considerably larger than the square of the refractive index.
F X, HASSION, R H, COLE
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The mechanism of the dielectric relaxation in water

Physical Chemistry Chemical Physics, 2016
The water spectra from Raman and Dielectric spectroscopies are combined to present a cohesive description of water dynamics up to the THz region.
Popov I., Ishai P., Khamzin A., Feldman Y.   +3 more
openaire   +4 more sources

Anomalies in the scaling of the dielectric α-relaxation

Physical Review Letters, 1993
By measuring the complex dielectric function over 15 decades in frequency we evaluate the scaling of the α-relaxation for several glass-forming liquids including propylene carbonate. The temperature dependence of the mean relaxation time and of the relaxation strength of the relaxation function displays two dynamical regions being separated by a ...
Schönhals, A., Kremer, F., Hofmann, A., Fischer, E., Schlosser, E.   +4 more
openaire   +3 more sources

Low-frequency dielectric relaxation in rubber

Physical Review E, 2001
A rubber sample is investigated by dielectric spectroscopy in the frequency range from 10(-2)
Janik, P., Paluch, M., Ziolo, J., Sulkowski, W., Nikiel, L.   +4 more
openaire   +3 more sources

Dielectric relaxation and dielectric fluctuations

Journal of Physics C: Solid State Physics, 1978
The relation between the frequency dependent dielectric constant and the fluctuations in the dielectric polarisation is re-examined from the standpoint of Felderhof's macroscopic theory of electric and magnetic fluctuations. Contributions of the electronic degrees of freedom to the polarisation are included in the formalism; they are treated as an ...
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Anomalous relaxation and dielectric response

Physical Review E, 2007
It is shown that all the known experimental (quasi)stationary dielectric response functions of glassy media can be derived from a standard generalized Langevin description of overdamped torsional dipole oscillators in trapping potentials with random orientations under some minimal assumptions.
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Dielectric Relaxations in CeO ₂

Physica Status Solidi (a), 1984
Dielectric relaxations in CeO2 are observed within the temperature range of 93 to 243 K. There are three relaxations each characterized by a nearly single relaxation time. The activation energies (E) and reciprocal frequency factors (τ0) are found to be 0.17, 0.30, 0.38 eV, and 1.35 × 10−10, 5.01 × 10−13, 1.42 × 10−148, respectively.
A. L. Bhattacharyya, N. Ch. Mitra
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Dielectric relaxation in Ba0.96Bi0.04Ti0.96Fe0.04O3

Journal of Applied Physics, 1998
Samples of Ba0.96Bi0.04Ti0.96Fe0.04O3 were prepared by a solid state reaction method. Data on the dielectric constant as a function of temperature and frequency were obtained in the temperature range 35–180 °C at 10 and 100 kHz. The material shows a diffuse phase transition.
M. Mahesh Kumar, M. B. Suresh, S. V. Suryanarayana, G. S. Kumar, T. Bhimasankaram   +4 more
openaire   +1 more source