Persistent Internal Polarization

Freeman, J. Reuben; Kallmann, H.; Silver, M.

doi:10.1103/revmodphys.33.553

Cited by 84 publications

(20 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Kallman and his collaborators (25) have made extensive investigations of the changes in electrical conductivity which can occur when fields are applied to excited phosphors, and have shown that a state of "persistent internal polarization" can be created by separation of charges in the bulk material. Kallman and his collaborators (25) have made extensive investigations of the changes in electrical conductivity which can occur when fields are applied to excited phosphors, and have shown that a state of "persistent internal polarization" can be created by separation of charges in the bulk material.…”

Section: Electric Field Effects On Cathodoluminescencementioning

confidence: 99%

Cathodoluminescence Saturation Phenomena in Y 2 O 2 S : Eu

Robbins

1976

J. Electrochem. Soc.

View full text Add to dashboard Cite

POLYCRYSTALLINE BETA ALUMINA RESISTIVITY 1219 served with yttria-con~aining ceramic such as 6G3-2, yttria is considered deleterious to ceramic life. Elimination of yttria yields samples such as 6M2-2 which appear to have approximately equivalent d-c resistivity to yttria-containing material but much smaller grain boundary capacitance. Consequently, the grain boundary (RbCb) resistivity transition in 6M2-2 merges with its intragrain transition. Since the grain boundary response is not single valued and the nature of the intragrain transition unknown, resolution of Rc and Rb is not straightforward. Multifrequency analysis or its equivalent may be of little use in separating intragrain and intergrain resistivity components in such "improved" specimens of polycrystalline beta alumina. ABSTRACTThe importance of a thermal perturbation of Y202S:Eu (0.1%) under excitation by long (up to 30 msec) electron beam pulses is investigated using the measured differential thermal behavior of luminescence lines originating in the 5D2, ~D1, and ado states. An observed droop in light output, equivalent to a saturation of the phosphor brightness, is found to be inconsistent with a thermal perturbation of the system. Other experiments involving a-c electric field modulation of the luminescence from the ~D states suggest that the droop may be caused by electric field perturbation of the system. The saturation characteristics of the phosphor are changed reversibly during a 30 msec pulse, and irreversibly by mixing with a conducting matrix. It is suggested that space-charge fields are generated by trapping of charge in surface states of the phosphor grains, and a simple kinetic model for the saturation mechanism involving field-induced ionization of the charge transfer state and quenching of the 5D2 state is in qualitative agreement with the experimental data. The relevance of the model to sa{uration phenomena and to aging in CRT screens is discussed. ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 130.126.162.126 Downloaded on 2015-03-11 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 130.126.162.126 Downloaded on 2015-03-11 to IP Vol. 123, No. 8 CATHODOLUMINESCENCE SATURATION PHENOMENA ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 130.126.162.126 Downloaded on 2015-03-11 to IP

show abstract

Section: Electric Field Effects On Cathodoluminescencementioning

confidence: 99%

Cathodoluminescence Saturation Phenomena in Y 2 O 2 S : Eu

Robbins

1976

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…This means that the cuticle contains or is made up of a ferroelectric material but without any persistent internal polarization (43).…”

Section: Discussionmentioning

confidence: 99%

Photovoltaic Effects in Hornets Are Correlated with the Time of Day¶

Sverdlov¹,

Ishay²

2004

Photochem Photobiol

View full text Add to dashboard Cite

This study deals with voltage values recorded off the cuticle of live specimens of the Oriental hornet Vespa orientalis (Hymenoptera, Vespidae). The relevant measurements were taken between the two tips of their bodies at various hours of the day and were made on a total of 90 worker hornets. Recorded voltage values varied within a range of 60-180 mV, with the lower values measured during the morning hours and the afternoon and the highest values during the noon hours. Measurements were made by direct contact of the electrodes with the hornet cuticle and did not prove lethal to the measured specimens. An additional 60 live hornets were measured in the same fashion but in the dark. The values recorded in the dark varied between 40 and 70 mV and displayed considerable fluctuations but were not found to be dependent on the time of measurement. The distribution of the voltage values in hornets measured at various hours in the daytime closely resembled that of the global radiations (in W/m2) on the same days the measurements were taken.

show abstract

“…For E x greater than that value, the peak occurs at E 2 &E V This behavior was observed in all materials for which field dependences were measured in detail. (6) The application of dc electric fields of the order of 10 4 V/cm simultaneously with the rf pulses was found to decrease the amplitude of the two-pulse echo monotonically. Also, stored signals could be destroyed by large rf electric fields.…”

Section: Echo Phenomena In Piezoelectric Crystalsmentioning

confidence: 96%

“…This is a consequence of the inhomogeneous spacecharge field of the grating. 6 Because of the nature of the tunneling probability, the echo amplitude is an extremely nonlinear function of the pulse amplitudes E x and E 2 . However, by assuming a distribution of trap depths, the behavior shown in Fig.…”

Section: Echo Phenomena In Piezoelectric Crystalsmentioning

confidence: 99%

Echo Phenomena in Piezoelectric Crystals

et al. 1973

View full text Add to dashboard Cite

We report an extensive set of experimental measurements on electric-field echoes in insulating and semi-insulating crystals. Previously suggested mechanisms cannot explain the results. In particular, three-pulse echoes with decay times T t of several hours have been observed at low temperatures in semi-insulating 1I-VI compounds. We propose a mechanism based upon the redistribution of trapped electronic space charge.

show abstract

Persistent Internal Polarization

Cited by 84 publications

References 12 publications

Cathodoluminescence Saturation Phenomena in Y 2 O 2 S : Eu

Cathodoluminescence Saturation Phenomena in Y 2 O 2 S : Eu

Photovoltaic Effects in Hornets Are Correlated with the Time of Day¶

Echo Phenomena in Piezoelectric Crystals

Contact Info

Product

Resources

About