Significant increase of the ferroelectric phase transition temperature in partially deuterated KH{sub 2}PO{sub 4} by proton irradiation

Journal Article · Mon Sep 17 00:00:00 EDT 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2784178· OSTI ID:21013628

Kim, Se Hun; Lee, Kyu Won; Oh, B H; Kweon, J J; Lee, Cheol Eui ^[1]

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1. Department of Physics, Korea University, Seoul 136-713, Korea and Institute for Nano Science, Korea University, Seoul 136-713, Korea and Faculty of Science Education and Educational Research Institute, Cheju National University, Cheju 690-756 (Korea, Republic of)

The ferroelectric phase transition temperature was significantly raised by 5 K in partially deuterated KH{sub 2}PO{sub 4} irradiated by a proton beam. Increase in the hydrogen bond length was indicated by the dielectric constant analysis. Deuteron nuclear magnetic resonance (NMR) measurements of the electric field gradient tensor showed atomic displacement after the proton irradiation, and {sup 31}P NMR measurements of the chemical shift tensor revealed phosphorous displacement in the hydrogen-bonded direction and the PO{sub 4} tetrahedral distortion. Increase of the phase transition temperature can be closely related to the structural modification involving the hydrogen-bond geometry.

• OSTI ID: 21013628
• Journal Information: Applied Physics Letters, Vol. 91, Issue 12; Other Information: DOI: 10.1063/1.2784178; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATOMIC DISPLACEMENTS
BOND LENGTHS
CHEMICAL SHIFT
DEUTERONS
ELECTRIC FIELDS
FERROELECTRIC MATERIALS
HYDROGEN
HYDROGEN COMPOUNDS
IRRADIATION
NUCLEAR MAGNETIC RESONANCE
PERMITTIVITY
PHASE TRANSFORMATIONS
PHOSPHORUS 31
POTASSIUM PHOSPHATES
PROTON BEAMS
PROTONS
TENSORS
TRANSITION TEMPERATURE