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Ferroelectric domain freezing and charge conduction in proton-irradiated K(H0.36D0.64)(2)PO4
- Authors
- Kim, Se-Hun; Oh, B. H.; Lee, Cheol Eui
- Issue Date
- 8월-2016
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- K(H0.36D0.64)(2)PO4; Ferroelectric domain freezing; Proton irradiation; Electrical conduction
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.69, no.4, pp.547 - 550
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 69
- Number
- 4
- Start Page
- 547
- End Page
- 550
- ISSN
- 0374-4884
- Abstract
- We have studied the effects of proton irradiation in K(H0.36D0.64)(2)PO4 single crystals by employing impedance spectroscopy. Frequency-dependent dielectric loss measurements allowed us to investigate changes in the domain wall dynamics of a proton-irradiated crystal with a ferroelectric phase transition temperature raised by 5 K. Thus, the increase caused by proton irradiation in the activation energy of the domain freezing in the direction of the hydrogen bonds was found to be significantly greater than in the case of KH2PO4. Furthermore, the temperature dependence of the power-law exponent n in the frequency-dependent electrical conductivity in the proton-conducting systems manifested changes arising from the proton irradiation in the interactions between the mobile ionic (proton) charges and their environments.
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