Current induced domain wall motion in nanostripes with perpendicular magnetic anisotropy

• Published in: Journal of magnetism and magnetic materials Vol. 322; no. 21; pp. 3601 - 3604
• Main Authors: Noh, Su Jung, Tan, Reasmey P., Chun, Byong Sun, Kim, Young Keun
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.11.2010; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Domain wall; Domain walls; Exact sciences and technology; Magnetic anisotropy; Magnetic devices; Magnetic properties and materials; Magnetic properties of nanostructures; Mathematical analysis; Mathematical models; Micromagnetics; Nanocomposites; Nanomaterials; Nanostructure; Perpendicular magnetic anisotropy; Physics; Saturation (magnetic); Domain wall; Micromagnetics; Perpendicular magnetic anisotropy; Micromagnetism; Electric field effects; Nanotape; Domain wall motion; Saturation magnetization; Landau Lifshitz equation
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2010.05.047

We report micromagnetic modeling results of current induced domain wall (DW) motion in magnetic devices with perpendicular magnetic anisotropy by solving the Landau–Lifschitz–Gilbert equation including adiabatic and non-adiabatic terms. A nanostripe model system with dimensions of 500 nm ( L)×25 nm ( W)×5 nm ( H) was selected for calculating the DW motion and its width, as a function of various parameters such as non-adiabatic contribution, anisotropy constant ( K u ), saturation magnetization ( M s ), and temperature ( T). The DW velocity was found to increase when the values of K u and T were increased and the M s value decreased. In addition, a reduction of the domain wall width could be achieved by increasing K u and lowering M s values regardless of the non-adiabatic constant value.