Microstructure investigation and magnetic study of permalloy thin films grown by thermal evaporation

The effect of edge-roughness of magnetic nanowires on the degree of asymmetry in transverse domain walls

“…Understanding the effect of experimental parameters on the characteristics of domain walls in magnetic nanowires is important for the success of their promising applications for emerging spin electronics, including racetrack memory devices, 1 magnetic logic gates, 2 and other low-dimensional applications. [1][2][3][4][5] A greater understanding of the fabrication process can provide a deep insight into the fundamental properties of the materials, such as microstructural properties, [6][7][8][9] domain wall (DW) dynamics, [10][11][12][13] and correlations between structural defects and electronic/magnetic properties. 12,13 When the width and thickness of a nanowire are scaled down to the nanoscale, a number of features will change.…”

Field-driven single domain wall motion in ferromagnetic nanowires

“…[1][2][3][4] An important parameter which directly affects the domain wall behaviour in such applications is the structural geometry, this can be engineered to either pin or allow the propagation of DWs in nanostructures. [1][2][3][4][5][6][7][8][9][10] To achieve such devices in feasible applications, a complete understanding of structural geometry in connection with DW behaviour needs to be exploited. A preferable geometry is a domain wall trap (DWT) structure [5][6][7] at which a DW can be created or driven to a particular position in the structure.…”

“…[1][2][3][4][5][6][7][8][9][10] To achieve such devices in feasible applications, a complete understanding of structural geometry in connection with DW behaviour needs to be exploited. A preferable geometry is a domain wall trap (DWT) structure [5][6][7] at which a DW can be created or driven to a particular position in the structure. [3][4][5] These DWT structures were designed as discrete elements which consist of a narrow central section/nanowire.…”

“…Among various geometries, [3][4][5][6][7] a DWT structure which consists of a narrow nanowire with an in-plane dimension of 200 Â 1000 nm 2 and two wider sections or diamond shapes, is preferable. This structure proved most successful in terms of its ability to support a head-to-head (H2H) or a tail-to-tail (T2T)-DW.…”

“…[12][13][14] While experimental results indicated that the asymmetry of the twodimensional (2D) geometric structure might affect the magnetic conguration. 6,7 The structure, as shown in Fig. 1(a), was also fabricated and characterized by Lorentz microscopy.…”