Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9834349 | Journal of Magnetism and Magnetic Materials | 2005 | 4 Pages |
Abstract
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 4Â MHz and the measurement scheme is based on the pulse method. The external magnetic field intensity is varied from 0 to 550Â mT and the angle between the magnetic field direction and the direction of ultrasonic wave propagation is varied from 0â to 90â. 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.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Masaaki Motozawa, Tatsuo Sawada,