Magnetization switching diagram of a perpendicular synthetic ferrimagnet CoFeB/Ta/CoFeB bilayer

O Koplak (1) , A Talantsev (2) , Yuan Lu (3) , Abbass Hamadeh (3) , Philipp Pirro (3) , Thomas Hauet (3) , R Morgunov (2) , Stéphane Mangin (3)

1 IKBFU - Immanuel Kant Baltic Federal University
2 Institute of Problems of Chemical Physics of RAS
3 IJL - Institut Jean Lamour

Magnetic configurations in synthetic ferrimagnet CoFeB/Ta/CoFeB bilayer with strong perpendicular ani-sotropy have been systematically studied. Magnetization versus field hysteresis loop has been measured for different temperature ranging from 5 to 300 K. The applied field – temperature (H-T) magnetization switching diagram has been constructed by extracting the different switching fields as a function of temperature. This switching diagram can be well explained by considering the competition between energy barrier of layer's magnetization reversal, interlayer exchange coupling, and Zeeman energy.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

O Koplak, A Talantsev, Yuan Lu, Abbass Hamadeh, Philipp Pirro, et al.. Magnetization switching diagram of a perpendicular synthetic ferrimagnet CoFeB/Ta/CoFeB bilayer. Journal of Magnetism and Magnetic Materials, 2017, 433, pp.91-97. ⟨10.1016/j.jmmm.2017.02.047⟩. ⟨hal-01569342⟩