Figure 4: Exchange-biased hysteresis loops for two representative samples.
From: Perpendicular exchange bias in ferrimagnetic spin valves
Left column: (a–c) the hysteresis loops measured for a sample with a 5 Å Ta interlayer spacer. Panel (a): the hysteresis loops of the DyCo5 and FeGd films were measured from 900 to −900 Oe. Panel (b): the system was saturated in a positive field of +3,000 Oe and consecutively a hysteresis loop was measured between +300 Oe and −300 Oe. Panel (c): the system was saturated in a negative field of −3,000 Oe and consecutively a hysteresis loop was measured between −300 Oe and +300 Oe. Right column: (d–f) the same scenario was followed for a sample with a Ta interlayer thickness of 10 Å. The dotted vertical lines mark the +300 Oe and −300 Oe fields. The statistical errors are smaller than the symbol size.
