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Electrical spin injection into semiconductors is fundamental to realize spintronic devices using the electron spin degree of freedom instead of or in addition to the charge. Datta-Das spin eld-eect transistor is a classical scheme which comprises ferromagnetic spin injector and detector while injected spins in the channel are manipulated by electric field.1 InAs nanowire is a suitable candidate as...
Ferromagnetic electrodes with perpendicular magnetic anisotropy (PMA) have been extensively studied because of the outstanding performance in applications. [1] To obtain high tunneling magnetoresistance (TMR), researchers have put efforts to realize PMA with Co-based full-Heusler alloy films with MgO barrier. However, the lattice mismatch between MgO and full-Heusler alloy leads to a rapid TMR reduction...
With the increasing of the sintered NdFeB magnet application, there is a great deal of the demand of Nd, consequently the price of Nd is rising. Therefore, it is necessary to produce a novel sintered NdFeB magnet at low costs. In this paper, the dual-main-phase CeNdFeB magnets were prepared. The corrosion potential of Ce is −2.48V, which is lower than that of Nd (−2.41V) [1]. But Ce is much cheaper...
Electric-Field-Control of magnetism using BiFeO3-based heterostructures is attracting a great amount of research interest. BiFeO3 (BFO) has outstanding ferroelectric properties and G-type antiferromagnetic ordering in the bulk. BFO has also a relatively high ferroelectric Curie temperature (TC∼1100K), high antiferromagnetic Neel temperature (TN∼640K), high remnant polarization (2Pr∼110μC/cm2), and...
We report an interdigitated electrode array (IDEA) impedance biosensor with rapid detection of Escherichia coli O157:H7. This biosensor has significantly better detection capability compared with the conventional microbiological testing method. The total detection time for this biosensor is under 3 hours. Dielectrophoresis (DEP) is used in conjunction with impedance spectroscopy to improve the detection...
Ta/Ta2O5 RRAMs show self-compliant characteristics in some Ta or Ta2O5 thickness range but Ti/TaOx RRAMs always need current compliance due to totally consumption of SC conduction layer.
In this paper, We report the design, modeling, fabrication and characterization MEMS Coulter counter which can monitor the dynamic cell impedance changes in situ as a function of time after mixing isolated cell populations with different extracellular media. The device consists of a multilayer of SU-8 microchannel which is divided into a passive mixing region, a focusing region using negative dielectrophoretic...
Multitendoned extrinsic muscles of the human hand can be divided into several neuromuscular compartments (NMCs), each of which contributes to the ability of human finger to produce independent finger movements or force. The aim of this study was to investigate the changes in the spatial activation of flexor digitorum superficialis (FDS) during the fingertip force production with non-invasive multichannel...
The high current density induced failure in Ge2Sb2Te5(GST)-based phase change memory (PCM) is investigated. A strong dependence of cycling endurance on the polarity of the operation current is observed and reported for the first time. The cycling endurance is reduced by 4 orders of magnitude when the current polarity is reversed. Careful TEM analysis of failed cells revealed a thin void in GST over...
Low current/voltage (1 nA/1.3V) operation of resistive switching memory device using Cu metallic filament in Ge0.2Se0.8 solid-electrolyte has been investigated. This resistive memory device have a large resistance ratio of > 10 at 1 nA current compliance, good endurance of ~105 cycles, and good data retention with a current of 1 nA up to 2×103 seconds. The low resistance state decreases with increasing...
Bipolar resistive switching memory device with a low power operation (200 muA/1.3 V) in a W/Ge0.4Se0.6/Cu/Al structure has been investigated. A stronger Cu chain formation can be observed by monitoring both the erase voltage and current. The low resistance state (RLow) decreases with increasing the programming current from InA to 500 muA, which can be useful for multi-level of data storage. This resistive...
Dielectric barrier discharge (DBD) with multi-needle to plane electrodes is attractive for some commercial use, especially air pollution control. The effect of electrodes' configuration on discharge behaviour is remarkable, as well as its applications. However, structural optimization of multi-needle to plane electrodes has not been studied systematically. In this paper, the space between nearby needles...
This paper focuses on the numerical investigation of the arc plasma behaviour with eddy currents mainly in electrodes and splitter plate generated by arc motion in arc splitting process. The elongation and splitting process are simulated through a three-dimensional (3D) magneto-hydro-dynamic (MHD) model. Without external magnetic field, the arc motion is described in detail by the temperature distribution...
It has been suggested that free radicals may be formed and that they may play a significant role in the electrical treeing process in solid polyethylene (PE).1 The techniques of electron paramagnetic resonance (EPR) should then be advantageous in a study of electrical treeing mechanisms, since EPR responds only to systems containing unpaired electrons, such as free radicals. The hyper-fine structure...
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