| Автор | S N Barilo |
| Автор | S V Shiryaev |
| Автор | A G Soldatov |
| Автор | T V Smirnova |
| Автор | V I Gatalskaya |
| Автор | W Reichardt |
| Автор | M Braden |
| Автор | H Szymczak |
| Автор | R Szymczak |
| Автор | M Baran |
| Дата выпуска | 2000-08-01 |
| dc.description | We report on the seeded growth of large (up to 2 cm<sup>3</sup>) single crystals of the cubic and orthorhombic phases of Ba<sub>1-x</sub>K<sub>x</sub>BiO<sub>3</sub>. The shape of the crystals varies with potassium content from a cube to a cube-octahedron shape at x~0.2. The flux saturated by Bi<sub>2</sub>O<sub>3</sub> alone with an anode potential of +740 mV were selected to grow cubic Ba<sub>1-x</sub>K<sub>x</sub>BiO<sub>3</sub> crystals with x = 0.67, T<sub>c</sub>~4.5 K. We found that a new cubic phase (x = 0.51, a = 4.266 Å) of crystals could be grown under +970 mV potential and reduced Bi<sub>2</sub>O<sub>3</sub> content in the flux. The crystals grown at ~250 °C acquired a cube-octahedron shape. In turn, crystals of the tetragonal Ba<sub>1.7</sub>K<sub>1.3</sub>Bi<sub>2</sub>O<sub>7</sub> phase (a = 4.25 Å, c = 21.91 Å) up to several mm<sup>3</sup> in size were grown at the same temperature but lower potential and higher Bi<sub>2</sub>O<sub>3</sub> concentration in the flux. Surprisingly the crystals exhibited a weak superconductor-like magnetization. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Potassium doped barium bismuthates coexisting near the tetra (ortho) and cubic phases boundary: crystal growth and properties |
| Тип | paper |
| DOI | 10.1088/0953-2048/13/8/306 |
| Electronic ISSN | 1361-6668 |
| Print ISSN | 0953-2048 |
| Журнал | Superconductor Science and Technology |
| Том | 13 |
| Первая страница | 1145 |
| Последняя страница | 1150 |
| Выпуск | 8 |
