Figure 7.

Room-temperature hysteresis loops. Ni nanoparticles with particle sizes of (a) 23, (b) 45, (c) 80, and (d) 114 nm. Inset shows greater detail of the measurements around the origin.

He et al. Nanoscale Research Letters 2013 8:446   doi:10.1186/1556-276X-8-446
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