Magnetic Moment Transformation in a Heterophase Nanomagnet GdFeCo|IrMn in the Vicinity of the Ferrimagnet Compensation Point

Abstract

Ta|Pt|GdFeCo|IrMn|Pt multilayer structure with perpendicular magnetic anisotropy in vicinity of the ferrimagnet compensation temperature TK has been carried out. It has been established that the distribution of the magnetic moment in the GdFeCo ferrimagnetic film exchange-coupled to the IrMn antiferromagnet is largely determined by the magnitude and orientation of both the field applied during cooling from room temperature to T=2 K and the testing field over the entire temperature range. It is shown that the direction of the domain wall moving changes to the opposite one at a fixed value of the amplitude of the magnetic field pulse when the temperature passes through the TK. Keywords: ferrimagnets, heterostructures, perpendicular magnetic anisotropy, magnetic moment, compensation temperature, domain wall.