| Автор | V A Trounov |
| Автор | A L Malyshev |
| Автор | D Yu Chernyshov |
| Автор | M M Korsukova |
| Автор | V N Gurin |
| Автор | L A Aslanov |
| Автор | V V Chernyshev |
| Дата выпуска | 1993-04-19 |
| dc.description | The crystal structure of intermediate-valence (IV) samarium hexaboride has been studied on single-crystal double-isotope samples <sup>154</sup>Sm<sup>11</sup>B<sub>6</sub> by X-ray diffractometry at room temperature and by high-resolution powder neutron diffraction in the temperature range 23 K<or=T<or=300 K. The X-ray experiment revealed the occurrence of vacancies at the boron site, larger thermal vibrations of the Sm atom than of La in the isostructural non-IV material LaB<sub>6</sub> and an aspherical charge distribution around the Sm nucleus. The neutron diffraction experiment confirmed the anomalous temperature dependence of the lattice parameter and revealed both a peculiar temperature dependence of the anisotropic thermal vibrations of the boron atom and a temperature-dependent change in the ratio of the isotropic thermal parameters of the Sm and B atoms. Thermal vibrations of the Sm ion can be satisfactorily described by the Einstein model with characteristic temperature Theta <sub>E</sub> approximately=120 K within the whole temperature range. The data obtained are discussed in terms of the influence of the fluctuating valence of the Sm ion on the structural parameters of atoms. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Temperature dependences of the parameters of atoms in the crystal structure of the intermediate-valence semiconductor SmB<sub>6</sub>: investigation by high-resolution powder neutron diffraction |
| Тип | paper |
| DOI | 10.1088/0953-8984/5/16/007 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 5 |
| Первая страница | 2479 |
| Последняя страница | 2488 |
| Аффилиация | V A Trounov; Nucl. Phys. Inst., Russian Acad. of Sci., Gatchina, Russia |
| Аффилиация | A L Malyshev; Nucl. Phys. Inst., Russian Acad. of Sci., Gatchina, Russia |
| Аффилиация | D Yu Chernyshov; Nucl. Phys. Inst., Russian Acad. of Sci., Gatchina, Russia |
| Аффилиация | M M Korsukova; Nucl. Phys. Inst., Russian Acad. of Sci., Gatchina, Russia |
| Аффилиация | V N Gurin; Nucl. Phys. Inst., Russian Acad. of Sci., Gatchina, Russia |
| Аффилиация | L A Aslanov; Nucl. Phys. Inst., Russian Acad. of Sci., Gatchina, Russia |
| Аффилиация | V V Chernyshev; Nucl. Phys. Inst., Russian Acad. of Sci., Gatchina, Russia |
| Выпуск | 16 |
