| Автор | J A Laban |
| Автор | V H McCann |
| Дата выпуска | 1995-09-04 |
| dc.description | In this work Mossbauer spectra of CsCo<sub>1-x-y</sub><sup>57</sup>Fe<sub>x</sub>Mg<sub>y</sub>Cl<sub>3</sub> (where x approximately 1% and y=0.07, 0.3, 0.7, 2.6%) in powdered form have been taken for a range of temperatures from 250 K down to 5.5 K. The spectra of these compounds taken below 21 K could be analysed in the same way as the spectra of CsCo<sub>0.09</sub>Fe<sub>0.01</sub>Cl<sub>3</sub> where the fits to the spectra are consistent with the magnetic phases of pure CsCoCl<sub>3</sub>. CsCoCl<sub>3</sub> is a one-dimensional Ising-like antiferromagnet and moving domain walls or 'solitons' have been observed in the one-dimensionally ordered Co<sup>2+</sup> chains from approximately 75 K down to 9 K. At 9 K full three-dimensional order is formed. However, experiments on Mg-doped CsCoCl<sub>3</sub> indicate that the Mg suppresses this transition so that it may be possible for solitons to be present below 9 K. No unequivocal evidence to indicate the presence of solitons below 9 K in Mg-doped CsCoCl<sub>3</sub> could be found in the Mossbauer spectra. It was found that the addition of the Mg lowers the temperature of the transition to the partially disordered phase, T<sub>N1</sub>, from 21.1+or-0.3 K (no Mg) to 19.6+or-0.3 K (2.6 at.% Mg). The spectra of CsCoCl<sub>3</sub> doped with 2.6 at.% Mg showed differences that resulted in soliton relaxation rates which were approximately a factor of two higher than the rates determined for the other compounds. In all compounds the soliton relaxation rates determined above 9 K were found to be between one and two orders of magnitude below the theoretical prediction for a non-interacting soliton gas and it is suggested that this model is not appropriate for CsCoCl<sub>3</sub>. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Mossbauer spectroscopy of CsCoCl<sub>3</sub> doped with <sup>57</sup>Fe and Mg |
| Тип | paper |
| DOI | 10.1088/0953-8984/7/36/017 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 7 |
| Первая страница | 7283 |
| Последняя страница | 7292 |
| Аффилиация | J A Laban; Dept. of Phys. & Astron., Canterbury Univ., Christchurch, New Zealand |
| Аффилиация | V H McCann; Dept. of Phys. & Astron., Canterbury Univ., Christchurch, New Zealand |
| Выпуск | 36 |
