NMR and impedance study of H+-ion irradiated TlH 2PO4

Se Hun Kim, Kyu Won Lee, Jae Won Jang, Cheol Eui Lee, S. J. Noh

Research output: Contribution to journalConference articlepeer-review


The H+-ion treatment effect on TlH2PO4, a KH2PO4 (KDP)-type ferroelectrics, was studied by nuclear magnetic resonance (NMR) and AC dielectric measurements. A sample of TlH 2PO4 was irradiated by 1-MeV H+ ion beams to a dose of 1015 ions/cm2. The irradiation changed the hydrogen-bond geometry, presumably affecting the order-disorder proton dynamics. The deformation of the PO4 tetrahedra was identified by the isotropic chemical shift and the full width at half maximum (FWHM) of the high-resolution 31P NMR spectra. A prominent decrease in the dielectric constant was also observed after the irradiation. The macroscopic and microscopic changes due to the irradiation are discussed in the light of the proton dynamics.

Original languageEnglish
Article numberK3.4
Pages (from-to)15-20
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Publication statusPublished - 2005
EventSolid State Ionics - 2004 - Boston, MA, United States
Duration: 2004 Nov 292004 Dec 2

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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