The generalized Landau–Lifshitz equations as tools for description of the dynamics induced by spin-polarized current in multisublattice antiferromagnet

Antiferromagnets (AFM) with zero or vanishingly small macroscopic magnetization are promising materials in spintronics. In the present paper we use the generalized Landau–Lifshitz’ equations to study the magnetic dynamics of AFM with three magnetic sublattices and, in particular, the switching processes between different equilibrium states. The conditions for effective switching with the use of pulse and dc current and external magnetic field are determined and the peculiarities of current-induced stationary states are investigated. The results obtained could be used for development of fast memory elements based on AFM materials.

PACS: 75.50.Ee Antiferromagnetics;
PACS: 72.25.Pn Current-driven spin pumping;
PACS: 85.75.–d Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields.

Key words: Landau–Lifshits equation, antiferromagnet, noncollinear antiferromagnet, spintronic.

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