Propagation of a Magnetic Domain Wall in a Submicrometer Magnetic Wire

Abstract

The motion of a magnetic domain wall in a submicrometer magnetic wire was detected by use of the giant magnetoresistance effect. Magnetization reversal in a submicrometer magnetic wire takes place by the propagation of a magnetic domain wall, which can be treated as a "particle." The propagation velocity of the magnetic domain wall was determined as a function of the applied magnetic field.

Optimized cobalt nanowires for domain wall manipulation imaged by in situ Lorentz microscopy

“…Therefore, many Py nanostructures of various shapes and sizes have been synthetized using electron beam or UV lithography processes. [1][2][3][4][5][6][7][8][9][10][11][12]15,16 The use of ferromagnetic materials alternative to Py and the development of advanced nanofabrication methods allowing creating magnetic nanostructures of dimensions less than 100 nm are however needed to explore their functionalities and possible applications. In the last years, focused electron beam induced deposition (FEBID) technique has demonstrated a capacity to produce high quality nanostructures based on multiple materials.…”

“…In the last decade, several pioneering works envisaged different strategies to design magnetic information storage, logic devices or sensors based on magnetic domain walls (DW) as functional entities to store, transfer, and process information in ferromagnetic media. [1][2][3][4][5] These innovative ideas and promising applications have motivated extensive developments of ferromagnetic nanostructures in which DW can be "easily" created and driven either by external magnetic fields and/or spin-polarized currents. 6-12 DW in magnetic nanostructures have therefore become a major topic for the research community in the field of Nanomagnetism.…”

“…[1][2][3][4][5] These innovative ideas and promising applications have motivated extensive developments of ferromagnetic nanostructures in which DW can be "easily" created and driven either by external magnetic fields and/or spin-polarized currents. [6][7][8][9][10][11][12] DW in magnetic nanostructures have therefore become a major topic for the research community in the field of Nanomagnetism.…”

Current-driven magnetic domain wall motion and its real-time detection

“…To achieve controlled magnetic DW motion, magnetic-fieldbased control was investigated in the early stage of research. [1][2][3][4] However, a magnetic field is not able to drive multiple DWs along the same direction and thus, is hardly applicable to DW-motion-based memory devices. In 1996, Berger showed in his seminar paper that an electric current can move multiple DWs along the same direction.…”

Orientation and temperature dependence of domain wall properties in FePt

“…This reflects the directionality of the exchange interactions in FePt. The directionality of the DW width and energy is an important factor which will effect other experimental properties, such as the domain wall mobility [9][10][11], magneto-resistance [12], switching fields and switching modes. Furthermore, it should be considered in micromagnetic calculations on FePt (and other layered magnets).…”