Study of Defects in Croconic Acid Single Crystals Using Positron Annihilation Lifetime Spectroscopy

Francisco Guzman; Judy Tran; Kimberley Cousins; Paul K. Dixon; Douglas Smith; Timothy D. Usher; Ren Wu Zhang

doi:10.4028/www.scientific.net/DDF.373.179

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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 373Study of Defects in Croconic Acid Single Crystals...

Study of Defects in Croconic Acid Single Crystals Using Positron Annihilation Lifetime Spectroscopy

Abstract:

Croconic acid is the first single molecular organic ferroelectric material exhibiting very high spontaneous polarization (~ 20 μC/cm²) at room temperature. Maximizing polarization depends on minimizing void defects in croconic acid crystals. In this experiment, the change in void defects upon the thermal treatment is characterized using positron annihilation lifetime spectroscopy. Both defect void size and intensity are measured, and their dependence upon the thermal treatment duration is studied. In addition, the relation between the void defect and ferroelectric hysteresis of croconic acid is established.

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Periodical:

Defect and Diffusion Forum (Volume 373)

Pages:

179-182

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.373.179

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Online since:

March 2017

Authors:

Francisco Guzman, Judy Tran, Kimberley Cousins, Paul K. Dixon, Douglas Smith, Timothy D. Usher, Ren Wu Zhang*

Keywords:

Croconic Acid, Defect, Ferroelectricity, Positron Annihilation

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