Application of CRAMPS for a Phase Transition in H+-ion irradiated TlH2PO4
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초록
We studied the hydrogen-bonded TlH2PO4 (TDP) ferroelectrics treated with the proton-beam bombardment. The TDP material was irradiated with 1-MeV proton beam at a dose of 1015/cm2. In order to analyze the hydrogen environment in TDP, we carried out the 1H high resolution nuclear magnetic resonance (NMR) - i.e., Combined Rotation And Multiple Pulse Spectroscopy (CRAMPS) measurement. The isotropic chemical shift of hydrogen indicates its displacive property is related to the PO4 lattice deformation which occurs throughout the antiferroelectric-, the ferroelastic- and the paraelastic-phase transitions. The temperature dependence of iso reveals the electronic charge redistribution is induced by the proton-beam irradiation and the elastic property.
Abstract
We studied the hydrogen-bonded TlH2PO4 (TDP) ferroelectrics treated with the proton-beam bombardment. The TDP material was irradiated with 1-MeV proton beam at a dose of 1015/cm2. In order to analyze the hydrogen environment in TDP, we carried out the 1H high resolution nuclear magnetic resonance (NMR) - i.e., Combined Rotation And Multiple Pulse Spectroscopy (CRAMPS) measurement. The isotropic chemical shift of hydrogen indicates its displacive property is related to the PO4 lattice deformation which occurs throughout the antiferroelectric-, the ferroelastic- and the paraelastic-phase transitions. The temperature dependence of iso reveals the electronic charge redistribution is induced by the proton-beam irradiation and the elastic property.
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