简介:Ta/MgO/NiFe/MgO/TaultrathinfilmswithandwithoutintercalationofNiFenanoparticlesinMgOlayerswerepreparedbymagnetronsputtering,followedbyavacuumannealingprocess.Themeasuredandcalculatedresultsshowthattheformerhashigherspecularelectronscattering(SES)parameteratMgO/NiFeinterfaces,lowerresistivity,andhighermagnetoresistance(MR).Theimprovedtransportproperties(TPs)aremainlyattributedtothesuppresseddiffuseelectronscatteringbymeansoftheintroductionofNiFenanoparticles.
简介:Theheatedprocessofrawmaterialsforelectrontrappingmaterials(ETM)isinvestigatedbythermo-analysismethod.Thetemperaturerangesofrawmaterialsexperiencedsomephysicalandchemicalchangeprocesses,suchasdehydration,organicsolventremoval,crystalsulphurburning,oxidationofalkalineearthsulfidesandsolidphasereaction(rareearthdoped)andsoon,areobtained.TheexperimentalresultsalsoshowthatthepresenceoftraceoxygeninshieldedgasisveryharmfultopreparetheETM.Therawmaterialthermo-analysisresultsprovideveryimportantexperimentalreferenceforoptimizingtheETMpreparationtechniques.
简介:一系列电子施主包括1,1-cyclopentanecarboxylic酸diethyl酉旨(CPCADEE),1,1-cyclopentanedimethanol醋性的diester(CPDMAD),1,1-biethoxymethyl戊烷(BEMP),2,2-diethyldiethylmalonate(DEDEM)和2,2-diethyl-1,3-propanediol醋性的diester(DEPDADE),被diethylmalonate(DEM)综合。上述产品的纯净和结构被煤气的层析(GC)和煤气的层析团分光计(GCMS)分别地描绘。而且,这些施主的可能的最佳的三维的结构借助于Gaussian03和Chem3D被模仿。然后,这些电子施主与tetrachloro钛(TiCl4)和氯化物镁(MgCl2)被协调为丙烯的聚合获得催化剂。当CPCADEE或DEPDADE被用作内部施主(标志)时,聚丙烯的催化活动和性质被增加外部施主(编辑)极大地改进。然而,当BEMP被用作标志时,没有增加编辑,最高催化的活动被获得,它能减少生产费用并且简化催化合成。实验显示BEMP有氧原子和最高的electronegativity的最短的距离。
简介:一个计划被开发计算在电子影响刺激以后射出的放射的极化。充分相对论的弄歪波浪的方法是使用的品种内异系交配体节计算。计划被用于象他一样和象Li一样离子。线极化的计算价值与另外的理论结果和试验性的价值相比。象ForHe一样U在更低的事件精力,,现在的极化在更高的精力在1%以内同意另外的理论的,差别增加直到大约10%。为象他一样Fe和Ti,为大多数线的极化度的现在的结果在试验性的错误酒吧以内同意试验性的数据。为象Li一样Ti线q(1s2s2p(2)P(3/2)到1s(2)2s),极化的现在的值与另一理论一个,和两个最优地同意值与在试验性的错误工具条以内的测量数据一致。
简介:WeproposeascalingtheoryforsinglegateAlInSb/InSbhighelectronmobilitytransistors(HEMTs)bysolvingthetwo-dimensional(2D)Poissonequation.Inourmodel,theeffectiveconductivepatheffect(ECPE)istakenintoaccounttoovercometheproblemsarisingfromthedevicescaling.Thepotentialintheeffectiveconductingpathisdevelopedandasimplescalingequationisderived.ThisequationissolvedtoobtaintheminimumchannelpotentialΦdeff,minandthenewscalingfactorαtomodelthesubthresholdbehavioroftheHEMTs.ThedevelopedmodelminimizestheleakagecurrentandimprovesthesubthresholdswingdegradationoftheHEMTs.TheresultsoftheanalyticalmodelareverifiedbynumericalsimulationwithaSentaurusTCADdevicesimulator.
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简介:Manynonlinearquantumopticalphysicsphenomenaneedmoreaccuratewavefunctionsandcorrespondingenergyorquasienergylevelstoaccountfor.AnanalyticexpressionofwavefunctionswithcorrespondingenergylevelsforanatomicelectroninteractingwithaphotonfieldispresentedasanexactsolutiontotheSchrSdinger-likeequationinvolvedwithbothatomicCoulombinteractionandelectron-photoninteraction.Thesolutionisanaturalgeneralizationofthequantum-fieldVolkovstatesforanotherwisefreeelectroninteractingwithaphotonfield.ThesolutionshowsthatanN-levelatominlightformstationarystateswithoutextraenergysplittinginadditiontotheFloquetmechanism.Thetreatmentdevelopedherewithcomputingcodescanbeconvenientlytransferredtoquantumopticsinclassical-fieldversionasresearchtoolstobenefitthewholephysicscommunity.
简介:Experimentally,theelectrondrageffectoncarbonnanotubesurfaceinflowingliquidswasinvestigated.Itwasfoundthatelectriccurrentcouldbegeneratedinmetalliccarbonnanotubesimmersedintheliquids.CarbonnanotubesweresynthesizedonSisubstratebyhotfilamentchemicalvapordeposition.Theexperimentalresultsshowedthattheflow-inducedcurrentonthesurfaceofcarbonnanotubefilmswascloselydependedontheflowrate,concentration,propertiesandtemperatureofliquids.Theflow-inducedcurrentwasincreasedwiththeincreasingofflowrate,concentrationandtemperatureofliquids.Theobtainedresultswerediscussedindetail.
简介:Carbonnanotube(CNT)reinforcedaluminummetalmatrixcompositeswereweldedbyelectronbeamweldingandthemicrostructuresofweldedjointswereinvestigated.TheresultshowedthattheinterfacialreactionhappenedbetweentheCNTsandAlmatrix,whichresultedinproducingbrittleAl_4C_3compoundsinelectronbeamwelds.Theextentofinterfacialreactionvariesgraduallyinthedepthandwidthdirection.ThelengthofthereactantsAl_4C_3becameshortduotothetemperaturegradientinthemoltenpool.ThequantityandsizeofAl_4C_3compoundsincreasedwiththeincreaseofbeamcurrentandthedecreaseofweldingspeedinthemiddlezoneofweld.However,noneedle-likephaseAl_4C_3wasobservedinHAZ.