Micromagnetic understanding of current-driven domain wall motion in patterned nanowires
By A. Thiaville, Y. Nakatani, J. Miltat, Yoshishige Suzuki. 2004
997 citations recorded by the source corpus.
In order to explain recent experiments reporting a motion of magnetic domain walls (DW) in nanowires carrying a current, we propose a modification of the spin transfer torque term in the Landau-Lifchitz-Gilbert equation. We show that it explains, with reasonable parameters, the measured DW velocities as well as the variation of DW propagation field under current. We also introduce coercivity by considering rough wires. This leads to a finite DW propagation field and finite threshold current for DW propagation, hence we conclude that threshold currents are extrinsic. Some possible models that support this new term are discussed.
Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/039feadf77cc930e1d624e09d02f532b9d8c8e36
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In Atomic and Molecular Physics, and Optics
In Materials Chemistry
- J. Sinova
- Mathias Kläui
- C. Marrows
- J. Shibata
- T. Jungwirth
- Allan H. MacDonald
- Axel Hoffmann
- J. Wunderlich
Citations in the corpus
- The emergence of spin electronics in data storage. (2007, background): “However, even qualitative agreement between experience and theory is not straightforward [102, 103].”
- Interface-Induced Phenomena in Magnetism (2016, positive): “generates a force FSTT = - G× u, with being the drift velocity of the spinpolarized electrons [Thiaville et al., 2005], where P is the spin polarization of the current.”
- Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems (2018, methodology): “Thiele’s equation has been generalized to include STT (Thiaville et al., 2005) and, more recently, also SOT (Sampaio et al., 2013).”
- Spin-polarised currents and magnetic domain walls (2005, background): “) This difference was ascribed to either the need to treat non-adiabatic effects [438] or take account of edge roughness [439, 440].”
- Spin-dependent phenomena and device concepts explored in (Ga,Mn)As (2013, background): “…viscous flow regime was achieved over a wide current range allowing to observe (De Ranieri et al., 2013) the lower-current steady DW motion regime separated from a higher-current precessional regime by the Walker bre kdown (WB) (Metaxas et al., 2007; Mougin et al., 2007; Thiaville et al., 2005).”