Additional file 1.

supporting information. Fig. S1 Magnetization vs. field loop measured at 5 K under ZFC and FC conditions Fe₃O₄/FeO composite particles with different fraction of FeO.

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