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. 2011 Mar 16;6(1):226. doi: 10.1186/1556-276X-6-226

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Copyright ©2011 Swiatkowska-Warkocka et al; licensee Springer.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Illustration of the FC and ZFC hysteresis loops. (a) Hysteresis loops of the Fe₃O₄/FeO particles fabricated at 177 mJ/pulse^.cm². FC means that the sample is cooled from 300 to 5 K in the 50 kOe field. (b) The magnification around origin of hysteresis loops of the Fe₃O₄/FeO particles fabricated at 177 mJ/pulse cm².