skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Mechanism of relaxation polarization in lithium fluoride single crystals

Abstract

The authors have compared the thermally stimulated currents and the pulsed electromagnetic radiation of thermoelectrets and mechanoelectrets made from lithium fluoride single crystals grown without specially introduced impurities. The samples with platinum electrodes applied to the surface by cathodic sputtering were deformed along the largest face up to relative strain /var epsilon/ equal to 1.4%. Then the thermally stimulated currents were registered upon heating the samples at the rate of 3-4 deg/min. In other experiments, after deformation of the samples under analogous conditions they registered the pulsed electromagnetic signals for the samples upon nonisothermal annealing. Plane-parallel samples were polarized at the temperature 473 K and electric field intensity 5 kV/cm for 10-15 min. Since thermally stimulated currents and pulsed electromagnetic signals at 363-383 K decreased substantially over the course of several hours after polarization or deformation of the samples and were practically unregistered after one day, while the volume charge in LiF can be retained over the course of many months, they may conclude that the first relaxation maximum is not connected with disruption of the volume charge. It is possible due to localization of cationic vacancies on individual dislocations, while the second maximum may be due to such dislocationmore » pile-ups.« less

Authors:
; ; ;
Publication Date:
Research Org.:
S.M. Kirov Tomsk Polytechnic Institute (USSR)
OSTI Identifier:
5951543
Resource Type:
Journal Article
Journal Name:
Inorg. Mater. (Engl. Transl.); (United States)
Additional Journal Information:
Journal Volume: 24:7; Other Information: Translated from Izv. Akad. Nauk. SSSR, Neorg. Mater.; 24: No. 7, 1227-1228 (Jul 1988)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ELECTRETS; THERMOELECTRIC PROPERTIES; LITHIUM FLUORIDES; POLARIZATION; ANNEALING; CARRIER MOBILITY; DEFORMATION; DISLOCATIONS; ELECTRIC CONDUCTIVITY; ELECTRIC CURRENTS; ELECTRIC FIELDS; ELECTROMAGNETIC PULSES; MONOCRYSTALS; RELAXATION; TEMPERATURE EFFECTS; VACANCIES; ALKALI METAL COMPOUNDS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; CRYSTALS; CURRENTS; DIELECTRIC MATERIALS; ELECTRICAL PROPERTIES; ELECTROMAGNETIC RADIATION; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; HEAT TREATMENTS; LINE DEFECTS; LITHIUM COMPOUNDS; LITHIUM HALIDES; MATERIALS; MOBILITY; PHYSICAL PROPERTIES; POINT DEFECTS; PULSES; RADIATIONS; 360603* - Materials- Properties; 360602 - Other Materials- Structure & Phase Studies

Citation Formats

Annenkov, Yu M, Boev, S G, Kozhemyakin, V A, and Fursa, T V. Mechanism of relaxation polarization in lithium fluoride single crystals. United States: N. p., 1988. Web.
Annenkov, Yu M, Boev, S G, Kozhemyakin, V A, & Fursa, T V. Mechanism of relaxation polarization in lithium fluoride single crystals. United States.
Annenkov, Yu M, Boev, S G, Kozhemyakin, V A, and Fursa, T V. 1988. "Mechanism of relaxation polarization in lithium fluoride single crystals". United States.
@article{osti_5951543,
title = {Mechanism of relaxation polarization in lithium fluoride single crystals},
author = {Annenkov, Yu M and Boev, S G and Kozhemyakin, V A and Fursa, T V},
abstractNote = {The authors have compared the thermally stimulated currents and the pulsed electromagnetic radiation of thermoelectrets and mechanoelectrets made from lithium fluoride single crystals grown without specially introduced impurities. The samples with platinum electrodes applied to the surface by cathodic sputtering were deformed along the largest face up to relative strain /var epsilon/ equal to 1.4%. Then the thermally stimulated currents were registered upon heating the samples at the rate of 3-4 deg/min. In other experiments, after deformation of the samples under analogous conditions they registered the pulsed electromagnetic signals for the samples upon nonisothermal annealing. Plane-parallel samples were polarized at the temperature 473 K and electric field intensity 5 kV/cm for 10-15 min. Since thermally stimulated currents and pulsed electromagnetic signals at 363-383 K decreased substantially over the course of several hours after polarization or deformation of the samples and were practically unregistered after one day, while the volume charge in LiF can be retained over the course of many months, they may conclude that the first relaxation maximum is not connected with disruption of the volume charge. It is possible due to localization of cationic vacancies on individual dislocations, while the second maximum may be due to such dislocation pile-ups.},
doi = {},
url = {https://www.osti.gov/biblio/5951543}, journal = {Inorg. Mater. (Engl. Transl.); (United States)},
number = ,
volume = 24:7,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 1988},
month = {Thu Dec 01 00:00:00 EST 1988}
}