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Spin-polarized currents represent an efficient tool for manipulating ferromagnetic nanostructures but the critical current density necessary for the magnetization switching is usually too high for applications. Here we show theoretically that, in magnetic tunnel junctions having electric-field-dependent interfacial anisotropy, the critical density may reduce down to a very low level (~10(4) A c...

We theoretically study the recently observed tunnel-barrier-enhanced dc voltage signals generated by magnetization precession in magnetic tunnel junctions. While the spin pumping is suppressed by the high tunneling impedance, two complementary processes are predicted to result in a sizable voltage generation in ferromagnet F insulator I normal metal N and F I F junctions with one ferromagnet be...

Full-scale/model test comparison studies to validate the traditional atmospheric boundary layer (ABL) wind tunnel simulation technique are reviewed. According to the literature review, notable discrepancies between full-scale measurement results and model test results were observed by most performed comparison studies, but the causes of the observed discrepancies were not revealed in a scientif...

Double layer two-dimensional electron systems at high perpendicular magnetic field are used to realize magnetic tunnel junctions in which the electrons at the Fermi level in the two layers have either parallel or antiparallel spin magnetizations. In the antiparallel case the tunnel junction, at low temperatures, behaves as a nearly ideal spin diode. At elevated temperatures the diode character ...

We report the control of the growth mode of Bi(2)FeCrO(6) thin and ultrathin films by either tuning the pulsed laser deposition parameters or by using a buffer layer. The films are epitaxial and the heterostructures exhibit very smooth interfaces, thus eliminating the main obstacle in the realization of tunnel junctions. By characterizing the functional properties of thin films we find that Bi(...

Based on the existing monitoring data, this paper uses matured data method to analyze, predict long-term settlement of subway shield tunnel, and comprehensively analyzes tunnel in saturated sand layer Zhengzhou. Logical curve model, etc. is used separately Zhengzhou metro tunnel. Combining prediction results summarize characteristics a model suitable for sandy soil area represented by obtained,...

A new approach in spintronics is based on spin-polarized charge transport phenomena governed by antiferromagnetic (AFM) materials. Recent studies have demonstrated the feasibility of this approach for AFM metals and semiconductors. We report tunneling anisotropic magnetoresistance (TAMR) due to the rotation of antiferromagnetic moments of an insulating CoO layer, incorporated into a tunnel junc...

To make a uniform AlOx barrier layer in tunnel junctions, a thin layer of Al is often sputtered first and then oxidized. In this study, we sputtered a thick layer of Al onto Fe3O4 and then employed high resolution transmission electron microscopy and x-ray energy dispersive spectroscopy to investigate the interfacial microstructures. Two new layers have been found and investigated at the Al/Fe3...

The multi hop mesh networkan extension of wireless mesh network by ad hoc networkis one promising wireless network architecture in the near future. Securing access network is the first protection against attacker access to network services. Authentication is an essential for securing the access to the network. TLS/SSL (Transport Layer Security/Secure Socket Layer) protocol is one famous secure ...