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Showing 1 to 20 of 97 for “"domain walls"”.
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Analysis of ultra-narrow ferromagnetic domain walls
… analysis of ultra-narrow ferromagnetic domain walls was undertaken, with graphical plots coded in the programming language TrueBASIC. An intrinsic inter-atomic potential stemming from the breakdown of the continuum approximation of matter is calculated and its contribution to the …
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Magnetic domain walls driven by interfacial phenomena
A domain wall in a ferromagnetic material is a boundary between differently magnetized regions, and its motion provides a convenient scheme to control the magnetization state of the material. Domain walls can be confined and moved along nanostrips of magnetic thin films, which are proposed …
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Hall Potential Mapping of Conducting Ferroelectric Domain Walls
… distinct conductivity at certain ferroelectric domain walls has the potential to revolutionise nanoelectronics. Complete control over their local carrier properties would allow two-dimensional analogues of semiconducting devices to be dynamically written, effectively supplanting modern printed …
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Domain walls in the two dimensional Ising strip
Thesis: M.S., Massachusetts Institute of Technology, Department of Physics, 1992
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The dynamic behavior of domain walls in barium titanate
Thesis (Ph.D.) Massachusetts Institute of Technology. Dept. of Physics, 1954.
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Phonon scattering by ferroelectric domain walls in potassium dihydrogen phosphate
I have studied phonon scattering by ferroelectric domain walls in KH2P04 (KDP) using thermal conductivity and phonon imaging measurements of samples in both single-domain (poled) and multidomain states. Domains were eliminated by applying a 2- 3kV /em field using evaporated electrodes. Phonon …
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180 degree domain walls as a source of magnetoacoustic emission
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1993.
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Charged ferroelectric domain walls: the next generation in 2D functional materials
… of charge carriers in conducting ferroelectric domain walls in single crystals of YbMnO3, ErMnO3 and lithium niobate. <br/><br/>Through the use of atomic force microscopy (AFM), electron microscopy and electrical measurements I measured Hall mobility in these systems. This revealed that carriers …
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Explorations of domain walls and half quantum vortices in unconventional superconductors
… time-reversal symmetry are proposed to admit domain walls that separate regions of opposing chirality. Thus--in addition to conventional vortices--the topological structure of the unconventional superconducting order of Sr2RuO4 may allow for at least two additional topologically stable …
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Magnetic behavior of 360° domain walls in patterned magnetic thin films
360° transverse domain walls (360DWs), which form readily from transverse 180° domain walls (180DWs) of opposite sense, demonstrate qualitatively distinct behaviors from their constituent 180DWs and are therefore of interest both from a physics perspective and for their applications in future …
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Magnetic microparticle trapping and mechanical excitation using domain walls in magnetic microstructures
… of using the resonant frequency of magnetic bead-domain wall (DW) couples in a host fluid to measure particle size. Nickel-Iron (Permalloy) rings, made using electron beam lithography, served as the tracks for nucleating and moving DWs, and Invitrogen Dynabeads M-270 magnetic beads were used for …
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Structure and dynamics of magnetic domain walls in multi-sublattice magnetic oxides
… technology is racetrack memory, where magnetic domain walls (DWs) are encoded with bits of information and are translated by currents on thin-film racetrack devices. What enables the current-driven motion of the DW is its Néel character, generally stabilized by the Dzyaloshinskii–Moriya …
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Magnetic domain walls for on-chip transport and detection of superparamagnetic beads
… the non-volatility and fast speeds of magnetic domain walls (DWs), their study has been largely driven by their application to information technology. In this work, the use of magnetic DWs for superparamagnetic bead capture and manipulation was investigated and extended. The interaction and …
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Emergence of charge density wave domain walls above the superconducting dome in TiSe2
… of the CDW order, but to the formation of CDW domain walls.
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An Investigation of the Structure, Pinning and Magnetoresistance of Domain Walls in Ni81Fe19 Planar Nanowires
… of the effect of geometrical confinement on domain wall (DW) structure and pinning behaviour in nanowire structures. The out-of-plane structural properties of thermally evaporated Ni81Fe19 thin films on pre-oxidised silicon substrates have been investigated using x-ray scattering techniques …
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Geometrical control of domain walls and the study of domain wall properties of materials with perpendicular magnetic anisotropy
… and background in the study of magnetic domain walls (DWs), which have attracted great attention due to their ability to be moved by field and/or current and corresponding potential applications in high speed memory or logic devices. I will then discuss how to geometrically control the …
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Multiscale Simulations of Dynamics of Ferroelectric Domains
… The intrinsic inertial response of ferroelectric domain walls is studied in PbTiO3. Examination of the evolution of the polarization and local structures of domain walls reveal that they stop moving immediately after the removal of the electric field, demonstrating that ferroelectric domain walls …
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