Figure 4.

Comparison of hysteresis loops of cobalt nanowires. a, c, e The loops taken when the magnetic field was applied parallel to the wire long axis, b, d, f The loops taken when the field was applied perpendicular to the wire long axis. g, h Coercivity values as a function of diameter (calculated from hysteresis loops) for applied filed parallel and perpendicular to the wire long axis, respectively

Maaz et al. Nanoscale Research Letters 2010 5:1111-1117   doi:10.1007/s11671-010-9610-5