Abstract
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 language | English |
---|---|
Article number | K3.4 |
Pages (from-to) | 15-20 |
Number of pages | 6 |
Journal | Materials Research Society Symposium Proceedings |
Volume | 835 |
State | Published - 2005 |
Event | Solid State Ionics - 2004 - Boston, MA, United States Duration: 29 Nov 2004 → 2 Dec 2004 |