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Recently, Spin-Orbit torque (SOT) arising from the ferromagnetic heterostructures consisting of an ultra-thin ferromagnet (FM) sandwiched between a heavy metal (HM) and an Oxide layer has attracted extensive attention in the low power magnetic memory and logic devices.
Current induced spin-orbit effective magnetic fields in metal/ferromagnet/ oxide trilayer provide an alternative switching mechanism that is more efficient than the conventional spin torque transfer.
Manipulating the magnetization of nanomagnets by local electric current has been widely studied in the past few years because of its promise in non-volatile magnetic memory and logic devices.1–3
In the array of 3D stackable non-volatile logic and memory devices, magnetic tunnel junction (MTJ) devices are most important due to their virtually unlimited endurance, fast read/write speed and low power consumption. These features render MTJs as an ideal candidate for realizing logic structures [1]. An MTJ structure consists of two ferromagnetic layers separated by a thin, insulating spacer layer...
The anisotropic magnetoresistance of symmetrical Py (Ni81Fe19) nanowire network reflects the local magnetization dynamics via the bifurcated dual-branch.[1] The magnetoresistance (MR) would be useful for the development of logic devices utilizing magneto-electric binary bits.[2] Furthermore, the unique magnetization dynamics is able to assist in the understanding of artificial spin ice structures...
In recent years, magnetic tunnel junctions (MTJs) have attracted great interests in the development of next generation high density non-volatile memory and logic chips. Though several MTJ-based logic structures have been proposed and demonstrated, these designs necessitate the inclusion of other electronic components to read the spintronic data as an electronic signal. Additionally, different levels...
Magnetic skyrmions are stable spin configurations which originate from chiral interactions. Their topologically protected nature confers upon them a high stability while still retaining their very small size. These highly desirable characteristics have attracted significant scientific interest in the creation of a skyrmion-based memory device. However, skyrmions are also highly resistant to the conventional...
Recently, magnetic nanoparticles are gaining interest for use in magnetic biomedical applications, such as magnetomechanical cell destruction and magnetic hyperthermia. Biofunctionalized NiFe microdiscs, with the application of a low-frequency alternating magnetic field, have been used to demonstrate magnetomechanical cancer-cell destruction by generating an oscillatory motion that transmits a mechanical...
Domain walls (DWs) in magnetic nanowire have been recognised to have the potential to be used in ultra-high density storage and non-volatile logic devices. For actual applications, the creation of DW on the nanosecond timescale and perfect control of its dynamics is critical. The existing method for creating DW in which local Oersted field is used, two DWs are always nucleated; a head-to-head (HH)...
Magnetic skyrmion is a stable magnetization configuration with integer topological number which has recently been found in materials with broken inversion symmetry. Its most regarded property is that it is able to move under very low applied current due to its topological stability [1]. However, it has also been shown that under the application of current, the skyrmion is deflected from the intended...
Surface-functionalized superparamagnetic (SPM) beads have been widely used to detect and manipulate chemical and biological agents in lab-on-a-chip systems. Recently, it has been shown that by exploiting the stray field generated by domain walls in magnetic nanostructures, it is possible to capture and couple a SPM bead to a domain wall [1]. To store the captured bead, the domain walls can be pinned...
Magnetic skyrmions are vortex-like topologically stable spin textures, whose microscopic magnetic moments are of a whirling configuration and characterized by a finite topological winding number [1, 2]. They are promising candidates as information carriers for future spintronic devices because of their small size, facile current-driven motion and topological stability [3]. The controllable nucleation...
Fundamental properties like observation of magnetic monopoles in artificial spin ice lattice [1] depends on the underlying dynamics of magnetic domain walls (DWs) in geometrically frustrated structures. It has been reported previously that the DW follows a chirality dependent path in magnetic network structures [2-4]. This concept has been applied to generate 1D Dirac strings in artificial Kagome...
Skyrmions are stable magnetization configurations that readily arise in ferromagnetic materials with significant Dzyaloshinskii-Moriya interactions (DMI) [1]. One possible method to drive a skyrmion is via the application of current by making use of the Spin-Transfer-Torque (STT) from the conduction electron [2]. The behaviour of a skyrmion in such systems is akin to a pseudo-particle, to which familiar...
Magnetic skyrmions are nanoscale spin textures that are highly stable due to their protected topo-logical charge [1-2]. Skyrmions also experience almost no intrinsic pinning, allowing them to be easily manipulated with low current densities. These positive attributes allows the skyrmion to a very attractive candidate for next generation memory devices [2-4]. In this work, we demonsrate by micromagnetic...
This paper describes the benefits of using LeJOS and the Lego Mindstorms NXT set for teaching advanced software development. While Lego Mindstorms has been used in introduction to computer science courses, it is not reported to be widely used in a simulated production environment requiring such things as threading, network communications, and the implementation of command protocols. Additionally,...
The authors fabricated magnetic nanowires using electrochemical deposition technique and reported the growth of different types of nanowires and their manipulation on patterned magnetic structures. Short (5 micron) Ni wires and longer (20 micron) Au/Ni/Au/Ni were used as templates with the commercially available aluminium oxide porous membranes. To observe the ordering behavior of short nanowires...
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