Surface current-carrying domain walls
نویسندگان
چکیده
منابع مشابه
Surface Current-carrying Domain Walls
Domain walls, arising from the spontaneous breaking of a discrete symmetry, can be coupled to charge carriers. In much the same way as the Witten model for superconducting cosmic string, an investigation is made here in the case of U(1) × Z2 → U(1), where a bosonic charge carrier is directly coupled to the wall-forming Higgs field. All internal quantities, such as the energy per unit surface an...
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We present a model based on continuum elasticity and energy minimization for the study of ferroelastic domain walls close to a surface. We focus on walls orthogonal to the surface, and predict a double-peak structure in the surface values of the squared elastic strain, which is directly related to the chemical reactivity. We also compute the height proole, which can be measured, in principle, e...
متن کاملDirect imaging of current-driven domain walls in ferromagnetic nanostripes
To better understand the response of domain walls to current-induced spin transfer torques, we have directly imaged the internal magnetic structure of domain walls in current-carrying ferromagnetic nanostripes. Domain wall images were acquired both while a constant current was flowing through the wire, and after applying current pulses. Domain walls ranging from vortex walls in wide 1 m wires t...
متن کاملCurrent-driven dynamics of chiral ferromagnetic domain walls.
In most ferromagnets the magnetization rotates from one domain to the next with no preferred handedness. However, broken inversion symmetry can lift the chiral degeneracy, leading to topologically rich spin textures such as spin spirals and skyrmions through the Dzyaloshinskii-Moriya interaction (DMI). Here we show that in ultrathin metallic ferromagnets sandwiched between a heavy metal and an ...
متن کاملDetection of current-induced resonance of geometrically confined domain walls.
Magnetic domain walls are found to exhibit quasiparticle behavior when subjected to geometrical variations. Because of the spin torque effect such a quasiparticle in a potential well is excited by an ac current leading to a dip in the depinning field at resonance for current densities as low as 2 x 10(10) A/m2. Independently the resonance frequencies of transverse walls and vortex walls are det...
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ژورنال
عنوان ژورنال: Journal of Physics A: Mathematical and General
سال: 1996
ISSN: 0305-4470,1361-6447
DOI: 10.1088/0305-4470/29/16/030