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Effects of Porosity on Coercive Force of Particulate Medium
並列摘要
It has been suggested that the observed low coercive forces of some magnetic particulate medium, as compared with predictions of single-domain particle theory, may be due to porosity in the particles. Here this possibility is investigated theoretically. When interactions among the pores are considered, the coercive force of a single-domain particle depends on not only the porosity but also the number of pores. In some cases the porosity increases the coercive force, in. others it decreases it, while, the magnetization of the particle is always decreasing as porosity increases. The relationship between coercivity and porosity is quite linear. To increase the coercive force, it is concluded that the reduction of porosity is much important than the reduction of the pore number.
並列關鍵字
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延伸閱讀
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