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(a) Hysteresis loops for the unpatterned film at with cooling fields (black), 30 kOe (red), and 70 kOe (green). (b) Hysteresis loops for dots with diameter and periodicity measured at with cooling fields (black), 3 kOe (red), and 5 kOe (green).
Normalized remanent magnetization at vs cooling field . or −1 at correspond to fully negative or positive EB, respectively. (a) Results for dots with (black circles) and 400 nm (red triangles). Inset shows the results for the unpatterned film. (b) Results for dots with (black squares), 170 (red circles), 180 nm (blue triangles). Lines are guide to the eyes.
A schematic of AF domains (denoted by squares), either not covered (blue), partially covered (green), or fully covered (red) by a FM dot (gray). AF uncompensated moments inside the dashed-line circle are effectively involved in the competition with the interfacial coupling (see text).
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