118. Low-frequency current noise in single crystals and thin films of CdSe in alternating electric field

ABSTRACTA simple theory for the shape of the piezoelectric hysteresis loops (piezoelectric coefficient d vs. applied electric field E) is developed for the case of non-ferroelelastic 180° switching in ferroelectrics. The theory provides explanations for specific features of piezoelectric hysteresis loops, which have been observed in single crystals, thin films and in ceramics in particular. The piezoelectric coefficient may show a “hump”, i.e. when E decreases from the tip of the loop down to zero, d passes through a maximum, and a “nose”, i.e. a self-crossing of the loop close to its tips. The theory also explains the difference in the coercive fields seen in the polarization and piezoelectric loops.

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Microscopic Characteristics of Functional Fluid Suspended Diamond Particles Under the High-Voltage Alternating Electric Field

Volume 1: Symposia, Parts A and B ◽

10.1115/fedsm2007-37191 ◽

2007 ◽

Cited By ~ 1

Author(s):

Hiromichi Obara ◽

Ryousuke Ibata ◽

Yusuke Kawai ◽

Yasuaki Matsudair

Keyword(s):

Electric Field ◽

Flow Structure ◽

High Voltage ◽

Low Frequency ◽

Flow Structures ◽

Polishing Process ◽

Specific Flow ◽

Micro Particle Image Velocimetry ◽

Diamond Particles ◽

Alternating Electric Field

The microscopic characteristics of a functional fluid for a micro polishing process were investigated by microscopic observation and micro particle image velocimetry. This functional fluid, which consists of suspended micro scale diamond particles in insulated silicon oil, has two specific flow structures under a high-voltage alternating electric field. One flow structure consists of a reciprocating flow generated in one direction between the electrodes under low-electric-field and high-frequency conditions. The other flow structure consists of a rotational flow formed under high-electric-field and low-frequency conditions. These specific flow structures contribute actively to a polishing process and to the development of micro fluidic devices in the future. In the present study, the effect of the electric field on specific flow structures and the mechanism of the induced flow are clarified.

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Surface photopotential of single crystals of cadmium sulphide in an alternating electric field

British Journal of Applied Physics ◽

10.1088/0508-3443/17/10/305 ◽

1966 ◽

Vol 17 (10) ◽

pp. 1285-1291 ◽

Cited By ~ 2

Author(s):

Y L Yousef ◽

A Mishriky ◽

H Mikhail

Keyword(s):

Electric Field ◽

Single Crystals ◽

Cadmium Sulphide ◽

Alternating Electric Field

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Low-frequency current noise with a 1/fspectrum in solids

Soviet Physics Uspekhi ◽

10.1070/pu1985v028n02abeh003853 ◽

1985 ◽

Vol 28 (2) ◽

pp. 170-195 ◽

Cited By ~ 74

Author(s):

Sh M Kogan

Keyword(s):

Low Frequency ◽

Current Noise ◽

Frequency Current

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Charge-Transfer Features in Zinc Sulfide Doped Layers in a Low-Frequency Alternating Electric Field

Semiconductors ◽

10.1134/s1063782620060044 ◽

2020 ◽

Vol 54 (6) ◽

pp. 623-626

Author(s):

V. T. Avanesyan ◽

A. B. Zharkoy ◽

A. V. Rakina

Keyword(s):

Charge Transfer ◽

Electric Field ◽

Zinc Sulfide ◽

Low Frequency ◽

Alternating Electric Field

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THE EFFECT OF LOW FREQUENCY ELECTROMAGNETIC RADIATION ON THE MORPHOLOGY OF DENTAL AND PERIODONTAL TISSUES (EXPERIMENTAL INVESTIGATION)

Wiadomości Lekarskie ◽

10.36740/wlek201905110 ◽

2019 ◽

Vol 72 (5) ◽

pp. 773-778

Author(s):

Iryna V. Markovskaya

Keyword(s):

Electric Field ◽

Electromagnetic Radiation ◽

Low Frequency ◽

Histochemical Staining ◽

The Body ◽

Morphometric Study ◽

Control Group ◽

High Biological Activity ◽

Periodontal Tissues ◽

Alternating Electric Field

Introduction: Low intensity electromagnetic effects possess a high biological activity, reduce the adaptive reserves of the body, impair immunity, adversely affect the functional state of the organs and body systems. The aim of the study was to identify in the experiment the effect of low-frequency electromagnetic radiation on the morphological state of the dental and periodontal tissue. Materials and methods: The experiment was conducted on WAG rats weighing 180–200 g, during which two groups were formed: group 1 (control group) included 12 WAG rats, which were not performed any manipulations; the rats of group 2 (investigation group) (n=12) for 30 days were exposed to a 70 kHz low-frequency alternating electric field (5th frequency range) daily from 9.00 to 12.00. To simulate a low-frequency 70 kHz alternating electric field, certified experimental equipment was used. The study material was the upper jaw tissue. Histological and histochemical staining methods were used. Morphometric study was conducted. Results: Complex morphological study on the experimental material allowed identifying the damaging effect of low-frequency electromagnetic radiation on the structural components of tooth and periodontal tissues. Conclusions: Our findings suggest that the workers who are exposed to occupational low-frequency electromagnetic radiation should be included in the risk group for developing diseases of the dentomandibular system in order to carry out timely therapeutic and preventive measures.

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