Current-Driven Motion of Magnetic Domain Wall with Many Bloch Lines

Abstract

The current-driven motion of a domain wall (DW) in a ferromagnet with many Bloch lines (BLs) via the spin transfer torque is studied theoretically. It is found that the motion of BLs changes the current-velocity ($j$-$v$) characteristic dramatically. Especially, the critical current density to overcome the pinning force is reduced by the factor of the Gilbert damping coefficient $\alpha$ even compared with that of a skyrmion. This is in sharp contrast to the case of magnetic field driven motion, where the existence of BLs reduces the mobility of the DW.

References in corpus (4)

• Skyrmion Lattice in a Chiral Magnet
• Theory of current-driven motion of Skyrmions and spirals in helical magnets
• Rotating skyrmion lattices by spin torques and field or temperature gradients
• Threshold Current of Domain Wall Motion under Extrinsic Pinning, $\beta$-Term and Non-Adiabaticity

Cited by in corpus (2)

• Domain walls within domain walls in wide ferromagnetic strips
• Shape of magnetic domain walls formed by coupling to mobile charges