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A physics-based compact model is developed to capture the essential resistive switching behaviors of conductive-bridge random access memory (CBRAM) under DC and AC operations. Three types of evolution modes of conductive filament correlated with material properties and operation schemes are modeled based on experimental observations. By modeling the temperature and electric-field effects as well as...
In this paper, we applied the Born Iterative Method (BIM) to reconstruct three-dimensional inhomogeneous objects buried in spherically multilayered media. The nonlinear inverse problem is linearized by Born approximations and solved iteratively via the conjugate-gradient approach (CG). The forward scattering problem in the spherically multilayered media is solved by stabilized biconjugate-gradient...
The discovery of giant magnetoresistance (GMR) opens the door of spintronics [1]. Recently, GMR and tunneling magnetoresistance (TMR) spintronic devices prepared on flexible substrates, so called flexible spintronics, have attracted a lot of interest due to the mechanical flexibility, light weight, and low cost compared with rigid materials [2]. Controlling the magnetization direction by tuning the...
Exchange bias (EB) effect has been widely applied in magnetoelectronic devices such as magnetic tunneling junctions and spin valve sensors. Nowadays, the EB related flexible magnetic multilayers have found their application in wearable electronics, which are stretchable and bendable, and hence are closely strain related [1, 2]. Therefore, the investigation on the strain-mediated multi-field control...
Controlling the magnetic properties of solids by electric fields has been an interesting research subject, not only because of the intriguing correlation between the electric and magnetic orders in solid-state systems, but also the potential applications in ultra-low energy spintronic devices. In the past, research has mostly been carried out with multiferroic materials and magnetic semiconductors...
In recent years considerable efforts have been devoted to the monitoring of concentrations of particles with diameter less than 2.5 μm in the atmosphere. These PM2.5 particles are produced by both natural and anthropogenic sources, including internal combustion engines, smelters, coal power stations and other industrial plants. Fine and ultra-fine particles can stay airborne for a very long time due...
Composite insulators have been used in power network systems for more than 20 years in China due to their remarkable anti-contamination performance. Compared to porcelain and glass insulators, the pollution flashover performance of composite insulators is better, whereas their icing flashover performance is still not clearly known. Shed configuration is a key factor that influences flashover voltage...
Based on the new finding on switching behavior, for the first time a new memory operation principle is proposed to control the switching and to achieve improved performance of oxide-based RRAM including device-to-device and cycle-to-cycle uniformity, RESET current, and window of RHRS/RLRS ratio. Furthermore, a numerical simulation method is developed to evaluate the validity of the new operation principle...
The electric field integral equation for electromagnetic scattering by perfectly conducting cylinders is solved by the method of moments with weighted point matching technique. The associated impedance matrix is made symmetric by introducing a supplementary weighting factor and the resultant system of linear equations is solved by the Cholesky decomposition. This procedure yields a significant reduction...
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