With the development of the electron industry, the area of single recorded bit becomes smaller and smaller, and the areal recording density in magnetic recording is required to become higher and higher. 随着电子产业的不断发展,单个记录位的面积越来越小,对磁记录材料面密度的要求也越来越高,所以提高磁记录材料的记录性能已经成为研究焦点之一。