抄録
Experimental results for anisotropy and hysteresis of ultrasonic propagation velocity in a kerosene-based magnetic fluid are reported. The ultrasonic frequencies used are 1, 2 and 4 MHz and the measurement scheme is based on the pulse method. The external magnetic field intensity is varied from 0 to 550 mT and the angle between the magnetic field direction and the direction of ultrasonic wave propagation is varied from 0° to 90°. The ultrasonic propagation velocity increases with magnetic field intensity and ultrasonic frequency. Anisotropy due to the configuration of chain-like clusters is also observed. These results seem to be caused by cluster formation and the characteristic time of Brownian motion of the magnetic particles.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 66-69 |
| ページ数 | 4 |
| ジャーナル | Journal of Magnetism and Magnetic Materials |
| 巻 | 289 |
| DOI | |
| 出版ステータス | Published - 2005 3月 |
ASJC Scopus subject areas
- 電子材料、光学材料、および磁性材料
- 凝縮系物理学