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Realization of extreme tunnel magnetoresistance with a molecule-magnet-dimer junction

机译:分子-磁体-二聚体结的极端隧道磁阻实现

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By means of the Rate equation approach in the sequential tunneling regime, we study spin-polarized transport through a molecule magnet dimer of both ferromagnetic (FM) and antiferromagnetic (AFM) types, which is weakly coupled to collinear FM leads. We pay particular attention to the effect of spin exchange interactions between electron spin and the molecule magnet on the tunnel magnetoresistance (TMR). Giant positive TMR is found in the positive bias with the AFM dimer. Particularly we are able to realize the negative TMR of theoretical lowest limit. And thus the molecule dimer device acts as an ideal valve to blockade completely the current channel of parallel configuration of electrode polarizations.
机译:通过在连续隧穿状态下的速率方程方法,我们研究了通过弱耦合到共线FM引线的铁磁(FM)和反铁磁(AFM)类型的分子磁体二聚体的自旋极化传输。我们特别注意电子自旋和分子磁体之间的自旋交换相互作用对隧道磁阻(TMR)的影响。在AFM二聚体的正偏中发现了巨大的正TMR。特别是我们能够实现理论最低极限的负TMR。因此,分子二聚体装置可作为理想的阀来完全阻断电极极化平行配置的电流通道。

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