Figure 7.

Magnetic hysteresis loops for the samples with 75% of FeO. Coercivity Hc and exchange bias Hexch of Fe3O4/FeO composite particles as a function of temperature.

Swiatkowska-Warkocka et al. Nanoscale Research Letters 2011 6:226   doi:10.1186/1556-276X-6-226
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