Figure 5: XMCD from ferrimagnets.
From: Perpendicular exchange bias in ferrimagnetic spin valves
(a) Sketch of the transmission geometry with circularly polarized soft X-rays. The normalized transmitted spectra are shown in (b,c), measured for opposite orientations of the magnetic field (±3 kOe). In (d) and (e) the experimental XMCD spectra are shown. By fixing the photon energy at specific absorption edges and measuring the transmitted intensity while sweeping the external magnetic field, one obtains the element-specific hysteresis loops. Typical hysteresis loops measured at the L3 absorption edges of Fe and Co, and M5 absorption edges of Dy and Gd are shown in (f) and (g), and (h) and (i), respectively. The measurements have been performed for a DyCo5/Ta(5 Å)/FeGd sample at a temperature of 250 K, which is well above the compensation temperatures for both DyCo5 and FeGd layers.
