Abstract
The influence of the particle size distribution on the ratio of the peak temperature, T peak, to the blocking temperature, T Bm, in zero field cooled (ZFC) magnetization curves has studied for both ferromagnetic and antiferromagnetic particle systems. In both systems the ratio β=T peak/T Bm does not depend on the median particle volume. However, T Bm can be considerably different from T peak in both systems. These results show that the ZFC measurements can be used to determine T Bm values only if the particle size distribution of the system is known. Otherwise, the estimated T Bm values will have a large uncertainty, especially in systems with a broad particle size distribution.
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