The minimum magnetic field intensity needed to induce significant effect on cathodic limiting diffusion current density decreased with increasing ferric ion concentration.
引起极限扩散电流密度明显增加的临界磁场强度随三价铁离子浓度增加而减小。
Under this condition, superparamagnetic effect becomes the fundamental factor limiting the improvement of recording density.
在此情况下，超顺磁效应成为当前限制记录密度提高的主要因素。
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