| Автор | P de V Du Plessis |
| Автор | A M Venter |
| Автор | G H F Brits |
| Дата выпуска | 1995-12-11 |
| dc.description | Neutron diffraction measurements on high-purity Dy and Ho crystals indicate no discontinuity in the order parameter at T<sub>N</sub>, and no hysteresis in the value of T<sub>N</sub> within 0.05 K between consecutive cooling and heating runs. This finding is also reflected by the results of ultrasonic velocity and attenuation measurements, thus corroborating the continuous nature of the phase transition. Integrated neutron diffraction measurements near T<sub>N</sub> yield beta =0.38+or-0.02 for Dy and beta =0.39+or-0.02 for Ho in agreement with renormalization group predictions ( beta =0.39) of Mukamel, Krinsky and Bak. Neutron intensities in the paramagnetic region do not adhere to a conventional t<sub>+</sub><sup>- gamma </sup> dependence over the complete temperature regime. A possible description for the region near T<sub>N</sub> with a 2D-planar spin model is indicated. The critical velocity change Delta nu <sub>33</sub> of Ho near T<sub>N</sub> is discussed. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Neutron diffraction and ultrasonic studies of the helical implies/implied by paramagnetic phase transition in dysprosium and holmium |
| Тип | paper |
| DOI | 10.1088/0953-8984/7/50/020 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 7 |
| Первая страница | 9863 |
| Последняя страница | 9882 |
| Аффилиация | P de V Du Plessis; Dept. of Phys., Univ. of the Witwatersrand, Johannesburg, South Africa |
| Аффилиация | A M Venter; Dept. of Phys., Univ. of the Witwatersrand, Johannesburg, South Africa |
| Аффилиация | G H F Brits; Dept. of Phys., Univ. of the Witwatersrand, Johannesburg, South Africa |
| Выпуск | 50 |
