A magnetic recording medium comprising a non-magnetic support and a magnetic layer containing a ferromagnetic metal powder and a binder, wherein the ferromagnetic metal powder comprises an oxide layer and a metal portion surrounded by the oxide layer, and the ferromagnetic metal powder has an average long axis length of from 30 nm to 55 nm, a coefficient of variation of long axis length of not more than 25%, a coefficient of variation of axial ratio of not more than 20%, and a coefficient of variation of a thickness of the oxide layer of not more than 15%.
一种磁记录介质,包括非磁性支架和含有
铁磁性
金属粉末和粘结剂的磁层,其中
铁磁性
金属粉末包括氧化层和被氧化层包围的
金属部分,
铁磁性
金属粉末的平均长轴长度为 30 纳米到 55 纳米,长轴长度的变化系数不超过 25%,轴向比的变化系数不超过 20%,氧化层厚度的变化系数不超过 15%。