Intergranular exchange fields in CoPtCr granular media materials were quantified through ferromagnetic resonance measurements in various magnetic states. The data indicate that the exchange field in CoPtCr granular films with no oxide segregant is comparable to the saturation magnetization of the films. With an introduction of a SiO2 segregant, however, the exchange field decreases. A 30% volume fraction of the segregant reduces the strength of the intergranular exchange coupling to zero.

中文翻译：

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通过铁磁共振测量量化 CoPtCr 基垂直记录介质中的晶间交换耦合

CoPtCr 颗粒介质材料中的粒间交换场通过各种磁状态下的铁磁共振测量进行量化。数据表明，没有氧化物偏析剂的 CoPtCr 颗粒膜中的交换场与膜的饱和磁化强度相当。然而，随着 SiO2 隔离剂的引入，交换场会降低。30% 体积分数的隔离剂将晶间交换耦合的强度降低到零。