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The tunnel magnetoresistance (TMR) effect has attracted significant attention in recent years not only due to the extensive applications of the magnetic tunnel junctions (MTJs) but also for the understanding of the complex physics of spin dependent transport [1]. There has been an increasing amount of evidence that the TMR of MTJs is strongly influenced by the interface between magnetic electrodes...
The Kondo effect, one of the most interesting topics in condensed matter physics, shows significant influences on the transport behaviors in magnetic tunnel junctions (MTJs).[1] As we know that there is a competition between electron tunneling and Kondo scattering in MTJs.[2] However, it is not clear how Kondo effect will affect the transport properties of a multiferroic tunnel junction (MFTJ), a...
If not well designed, high voltage composite insulators are prone to ageing and failure due to corona and electric field stress. Particular care is required designing areas where the metal end connections meet the insulator core, otherwise a large electric field enhancement is observed. It is difficult to completely eradicate corona on any insulator, thus manufacturers try and minimise this phenomenon...
The solid-state power-combining amplifier is a key for modern communication and radar system. In this paper, a new high isolation power divider/combiner circuit based on improved magic-tee circuit is put forward to investigate. The simulated and tested results show that it can achieve very good performance of high isolation. With using this new power divider/combiner circuit, a 29~31GHz band continuous-wave...
Using Crosslight APSYS, we have made two-dimensional simulation of triple junction solar cells based on the CdZnTe/CdTe/Si material system with tunnel junctions. The basic physical quantities like band diagram, optical absorption and generation for the modeled TJ cell, and external quantum efficiency for individual sub cell junctions are obtained. Current matching analyses and multi-sun concentration...
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