| Автор | J. P. Pekola |
| Автор | K. Torizuka |
| Автор | J. M. Kyynäräinen |
| Автор | A. J. Manninen |
| Автор | W. Wojtanowski |
| Автор | G. K. Tvalashvili |
| Дата выпуска | 1990-09-15 |
| dc.description | Zero sound experiments on superfluid <sup>3</sup>He-A at low pressures (< 3 bar) and in strong magnetic fields (> 0.3 T) show an increase in the attenuation at low temperatures (≤ 0.4 mK) which has been a puzzle until the present experiment. Coupling of the re-entrant normal flapping (NFL) mode to zero sound in a geometry where sound propagates in the direction of the magnetic field is shown to arise from a boundary layer at the walls whose thickness is about the dipolar coherence length ξ<sub>D</sub> of <sup>3</sup>He-A. We estimate the value of ξ<sub>D</sub> at low temperatures and at low and intermediate pressures. We have also studied the nonlinearity of sound propagation near the NFL mode and found a reversal of it when passing the mode. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | The Re-Entrant Normal Flapping Mode in the Dipolar Boundary Layers of <sup>3</sup>He-A |
| Тип | lett |
| DOI | 10.1209/0295-5075/13/2/010 |
| Electronic ISSN | 1286-4854 |
| Print ISSN | 0295-5075 |
| Журнал | EPL (Europhysics Letters) |
| Том | 13 |
| Первая страница | 155 |
| Последняя страница | 160 |
| Выпуск | 2 |
