摘要
Influences of both the magnetic field strength H and the sweep rate dH/dt on the structural pattern evolution in a magnetic fluid film under perpendicular fields are systematically investigated. When the magnetic field is increased at a given rate, the structure evolves from a monodispersed state to a disordered one, then to the first-level ordered hexagonal structure, and finally to the second-level ordered structure through a transition state. With a higher dH/dt, the range of the applied magnetic field corresponding to the first-level ordered structure is widened and the field Hs, at which the transition occurs becomes higher. An empirical power law Hs ∞ (dH/dt) 0.4 was found. A phase diagram for the magnetic fluid film in the H-dH/dt plane is presented.
原文 | 英語 |
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頁(從 - 到) | 1881-1883 |
頁數 | 3 |
期刊 | Journal of Magnetism and Magnetic Materials |
卷 | 226-230 |
發行號 | PART II |
DOIs | |
出版狀態 | 已發佈 - 2001 |
ASJC Scopus subject areas
- 電子、光磁材料
- 凝聚態物理學