Coupling between the protons and PO 4 tetrahedra in H +-ion-irradiated TlH 2PO 4

Doug Young Han, J. H. Han, Cheol Eui Lee, Kwang Sei Lee, Se Hun Kim

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Abstract

We studied hydrogen-bonded TlH 2PO 4 (TDP) ferroelectrics treated with proton-beam bombardment. The TDP material was irradiated with a 1-MeV proton beam at a dose of 10 15/cm 2. To analyze the local microscopic structure of TDP, we conducted 1H combined rotation and multiple pulse spectroscopy (CRAMPS), nuclear magnetic resonance (NMR), and high-resolution 31P NMR measurements. The isotropic chemical shifts of hydrogen and phosphor nuclei exhibited displacive features throughout the antiferroelectric, ferroelastic, and paraelastic phases that were attributed to the interplay of PO 4 lattice deformation and the microscopic hydrogen bond network. The temperature dependence of the isotropic chemical shift σ iso in 1H and high resolution 31P NMR revealed that the electronic charge redistribution was induced by proton-beam irradiation and the material's elastic properties. We examined the proton-lattice relationship in terms of the proton's location in a local double minimum well and the displacive character of the PO 4 lattice.

Original languageEnglish
Pages (from-to)1550-1554
Number of pages5
JournalJournal of the Korean Physical Society
Volume61
Issue number9
DOIs
Publication statusPublished - 2012 Nov 1

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Keywords

  • Combined rotation and multiple pulse spectroscopy
  • Hydrogen bond
  • Proton beam irradiation
  • TlH PO

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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