摘要
磁性液体是一种新型的磁性材料,它由超细磁性微粒和基液构成的一种胶体体系.通常,Fe_3O_4微粒的直径在10nm左右.早在60年代,美国就开展了对它的研究工作(主要在航天方面).70年代后,许多国家对它的制备及其物理特性等发生了广泛的兴趣,如超声波、光波在磁性液体中的传输特性等的研究.现在磁性液体已用在润滑、密封、阻尼、医疗等方面.本文主要介绍磁性液体在波导中的微波衰减特性和相移特性的一些测量结果和分析.
The microwave tranamission characteristics of a ferrofluid (the carrier liquid being hydrocarbon and the magnetic particles being magnetite) magnetized with the biasing field H, have been measured. The phenomenon of ferro-magnetio resonance absorption in the ferrofluid has been observed. When the ferrofluid is biased far from the resonance field, low-loss transmission and non-reciprocal transmission, i.e., non-reciprocal attenuation and shift in the waveguide have been obtained respectively.
出处
《应用科学学报》
CAS
CSCD
1989年第2期185-188,共4页
Journal of Applied Sciences
