We have investigated the hydrogen ion beam irradiation effect on TlH2PO4 (TDP) showing an antiferroelectric phase transition and a ferroelastic phase transition. The polycrystalline sample was irradiated by 1MeV hydrogen ion beams to a dose of 1015ions cm2. The x-ray diffraction pattern shows a lattice elongation along the hydrogen bond direction. According to H1 rotating frame nuclear magnetic resonance measurements, the activation energy increased above the antiferroelectric phase transition after proton beam irradiation from 0.41to0.57eV, indicative of hampered proton motions. The temperature-dependent P31 high resolution nuclear magnetic resonance isotropic chemical shift indicated a displacive change in the PO4 tetrahedra, and the linewidth showed a broadening after the proton irradiation.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2005 Dec 1|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics