Exchange bias effect in Au-Fe3O4 dumbbell nanoparticles induced by the charge transfer from gold.
Mikhail Feygenson, John C. Bauer, Zheng Gai, Carlos Marques, Meigan C. Aronson, Xiaowei Teng, Dong Su, Vesna Stanic, Volker S. Urban, Kevin A. Beyer, and Sheng Dai
Phys. Rev. B 92, 054416 (2015)
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| Temperature-dependent ZFC and FC magnetizations for (a) Au-4 sample and (b) free solution of Fe3O4
and Au nanoparticles. The field-dependent magnetization measured after
field cooling in 50 kOe from 300 K for (c) Au-4 and (d) reference
samples at various temperatures. Inset: the same plot at lower fields,
showing no horizontal shift of the hysteresis loop. |
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