NMR and impedance study of H +-ion irradiated TlH 2PO 4

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The H +-ion treatment effect on TlH 2PO 4, a KH 2PO 4 (KDP)-type ferroelectrics, was studied by nuclear magnetic resonance (NMR) and AC dielectric measurements. A sample of TlH 2PO 4 was irradiated by 1-MeV H + ion beams to a dose of 10 15 ions/cm 2. The irradiation changed the hydrogen-bond geometry, presumably affecting the order-disorder proton dynamics. The deformation of the PO 4 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
Title of host publicationMaterials Research Society Symposium Proceedings
EditorsP. Knauth, C. Masquelier, E. Traversa, E.D. Wachsman
Number of pages6
Publication statusPublished - 2005
EventSolid State Ionics - 2004 - Boston, MA, United States
Duration: 2004 Nov 292004 Dec 2


OtherSolid State Ionics - 2004
CountryUnited States
CityBoston, MA


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Kim, S. H., Lee, K. W., Jang, J. W., Lee, C. E., & Noh, S. J. (2005). NMR and impedance study of H +-ion irradiated TlH 2PO 4 In P. Knauth, C. Masquelier, E. Traversa, & E. D. Wachsman (Eds.), Materials Research Society Symposium Proceedings (Vol. 835, pp. 15-20). [K3.4]