以左手材料为代表的,具有超常介电常数和磁导率的介质材料(超材料)已经成为材料领域的研究热点.目前,大多数超常电磁介质都是基于复杂人工结构获得.随着超材料的发展,其面临着加工技术的挑战以及物理学、材料学等方面的困难.旋磁材料铁磁共振可实现本征负磁导率的现象为构造新型超材料提供了一个新方向.基于铁磁共振的超材料具有磁场可调、结构简单等特点,受到了越来越多的关注.本文对铁磁共振原理进行了简单概述,就结构复合情况对基于铁磁共振的超常介质材料进行了归类划分,并结合周济课题组的研究工作,对几类主要的旋磁材料基超材料中负磁导率和负介电常数的产生机理与实验成果进行了总结,以期为超材料的研究提供新的思路.
With the abnormal permittivity and permeability, metamaterials such as left handed materials has become the hot focus in material filed. Most up-to-date metamaterials are artificial structures and confronted with numerous difficulties in processing technology, physics and materials science. Intrinsic negative permeability cart be induced by ferromagnetic resonance in gyromagnetic materials, which provides an available approach to manufacture new materials. Because of its magnetotunable property and simplicity, metamaterials based on ferromagetic resonance have been attracting increasing attention. In this paper, a brief analysis of the principle of the ferromagnetic resonance is given. According to the composite structure, the metamaterials based on ferromagnetic resonance are classified into several kinds. Associating with our research work, the mechanisms of negative permittivity and permeability for those metamaterials have been expatiated. The corresponding theoretical and experimental results are also summarized, which provides some references for the development of metamaterials.