ID 原文 译文
15705 除了传统的烧结磁体,近些年各国研究者也对含Ce纳米晶磁体进行了一系列研究。 In addition to traditional sintered magnets，researchers have also conducted a series of studies on Ce －containing nanocrystalline magnets in recent years．
15706 本文简要介绍了Ce2Fe14B磁体内禀性能和相组成,以及Ce基合金矫顽力机理;进一步对各向同性和各向异性含Ce纳米晶磁体的制备方法、磁性能和微观结构等研究结果进行综述分析,并展望其未来发展方向。 This paper surveys the intrinsic properties and phase composition of Ce2Fe14B magnets，and the coercive force mechanism of Ce－based alloys is also briefly discussed． The preparation methods，magnetic properties and microstructure of isotropic and anisotropic Ce－containing nanocrystalline magnets are reviewed andanalyzed． The future development trend is prospected as well．
15707 通过构建端连石墨烯纳米带(GNR)/碳纳米管(CNT)/石墨烯纳米带(GNR)对称复合异质结,研究了理想接触和实际接触对体系自旋电子输运特性的影响。 It is proposed a GNＲ/CNT /GNＲ heterojunction can be constructed by directly binding two semi－infinite zigzaggraphene nanoribbons to a segment of armchair carbon nanotube．
15708 采用非平衡格林函数结合自旋极化密度泛函理论的方法计算了GNR/CNT/GNR复合异质结的自旋电子输运特性,发现具有双实际接触的GNR/CNT/GNR异质结呈半导体性,表现出非常好的共振输运和自旋过滤特性,而具有双理想接触的GNR/CNT/GNR异质结呈金属性,共振输运和自旋过滤特性不明显。 Ideal and real contacts on the spin electronic transportproperties of the GNＲ/CNT /GNＲ heterojunctions were investigated by first principles calculation method，which is based onspin － polarized density functional theory and nonequilibrium Green ＇ s functions． It is found that the GNＲ/CNT /GNＲheterojunction with two realistic contacts exhibits semiconductor characteristics，which displays obvious resonance transportand spin filtering properties． In contrast，the GNＲ/CNT /GNＲ heterojunction with two ideal contacts exhibits metal characteristics without obvious resonance transport and spin filtering properties．
15709 这是因为在具有双实际接触的GNR/CNT/GNR异质结中GNR与CNT的接触区形成接触势垒,CNT如同一个共振腔,只有满足一定共振能量的上自旋电子才能通过,从而形成共振输运和自旋过滤效应。 This is a result of two actual contacts in theGNＲ/CNT /GNＲ heterojunction，namely，the contact region between GNＲ and CNT forms a contact barrier． And the CNTacts as a resonator and only allows the spin－up electrons of resonant energy to transport through the system，resulting in aremarkable spin－selective transport behavior．
15710 研究结果有助于设计高效的全碳分子自旋过滤器。 Our findings will be useful for building all－carbon spin injection and spin filter devices．
15711 基于Bethe理论和双束近似方法,构建了适用于单晶势垒层磁性隧道结的理论模型。 Based on the Bethe theory and the two－beam approximation，a theoretical model was developed for the magnetictunnel junctions with single crystal 2D－material barrier．
15712 该理论模型将单晶势垒层视作周期性光栅,因而可以充分地计入隧穿电子的相干性。 In the model，the single crystal barrier was treated as a diffractiongrating． As a result，the coherence of tunneling electrons can be well considered．
15713 进一步地,利用该理论计算了以单晶二维材料作为势垒层的磁性隧道结的偏压效应。 Furthermore，the theory was used tocalculate the effect of bias voltage on the magnetic tunnel junctions with the single crystal 2D－material barrier．
15714 根据计算结果,讨论了铁磁电极对偏压效应的影响以及偏压对厚度效应的影响。 The numerical simulation reveals how the ferromagnetic electrodes affect the effect of bias voltage and how bias voltage affect the effect ofthickness．