Magnetization reorientation of GdFeCo/Ir/GdFeCo heterostructures at critical temperatures

In GdFeCo/Ir/GdFeCo heterostructures with amorphous GdFeCo layers, three critical points were found in the temperature dependences of magnetization. neighborhood 100 K, compensation for magnetizations Gd and FeCo sublattices is observed, which form a magnetization minimum does not depend on magnetic field. As decreases, sharp stepwise transition corresponds to switching mutual magnetization's orientation layers between their parallel antiparallel configurations. This depends field measurement made. Its shifts range 70-300 K change 0.5-5 T. At low temperatures <50 spin glass state accompanied by decrease moment zero disappears when applied. Keywords: Compensation temperature, synthetic ferrimagnet, exchange interaction, anisotropy.