| Автор | Tetsuo Asaji |
| Автор | Masanori Yoza |
| Автор | Tomohiro Ishizaka |
| Дата выпуска | 1999-07-05 |
| dc.description | The effect of deuteration on the motion of ammonium ions and/or the structural phase transition in NH<sub>4</sub>AuCl<sub>4</sub> was studied by means of <sup>35</sup>Cl nuclear quadrupole resonance measurements. The transition temperature shifted by 5 K from 28.5 K for NH<sub>4</sub>AuCl<sub>4</sub> to 33.5 K for ND<sub>4</sub>AuCl<sub>4</sub>. Spin-lattice relaxation caused by the modulation of the electric field gradient due to the motion of nearby ammonium ions was observed. The activation energy of the motion of the ammonium ions was determined to be 0.8 and 1.8 kJ mol<sup>-1</sup> for NH<sub>4</sub>AuCl<sub>4</sub> and ND<sub>4</sub>AuCl<sub>4</sub>, respectively. By the use of the simple harmonic oscillator model, the barrier height V<sub>0</sub> and the number of wells n of the potential for the reorientation of the ammonium ions were determined as V<sub>0</sub> = 4.2 kJ mol<sup>-1</sup> and n = 4 from the above activation energies for the NH<sub>4</sub><sup>+</sup> and ND<sub>4</sub><sup>+</sup> reorientations. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | The effect of deuteration on the motion of ammonium ions and the structural phase transition in NH<sub>4</sub>AuCl<sub>4</sub> |
| Тип | paper |
| DOI | 10.1088/0953-8984/11/26/322 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 11 |
| Первая страница | 5219 |
| Последняя страница | 5223 |
| Аффилиация | Tetsuo Asaji; Department of Chemistry, College of Humanities and Sciences, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan |
| Аффилиация | Masanori Yoza; Department of Chemistry, College of Humanities and Sciences, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan |
| Аффилиация | Tomohiro Ishizaka; Department of Chemistry, College of Humanities and Sciences, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan |
| Выпуск | 26 |
