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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Preparation and magnetotransport properties of MgO-barrier-based magnetic double tunnel junctions including nonmagnetic nanoparticles
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Preparation and magnetotransport properties of MgO-barrier-based magnetic double tunnel junctions including nonmagnetic nanoparticles

机译：含非磁性纳米粒子的基于MgO势垒的磁性双隧道结的制备及磁输运性质

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摘要

MgO-barrier-based magnetic double tunnel junctions including Au or Cr nanoparticles were prepared by molecular beam epitaxy, and their magnetotransport properties were investigated. A double junction sample including Au nanoparticles showed the Coulomb blockade effect and clear magnetoresistive hysteresis loops. The observed bias voltage dependence of the resistance and magnetoresistance ( MR) suggested that the MR effects of 1 - 2% at high bias voltages were caused by spin accumulation in the Au nanoparticles. In the case of Cr nanoparticles, a double junction with relatively low sample resistance was obtained, showing a clear Coulomb threshold.
机译：通过分子束外延制备了包括Au或Cr纳米粒子的基于MgO-势垒的磁性双隧道结，并研究了它们的磁输运性质。包含金纳米颗粒的双结样品显示出库仑阻塞效应和清晰的磁阻磁滞回线。观察到的与电阻和磁阻（MR）的偏置电压相关性表明，在高偏置电压下1-2％的MR效应是由Au纳米粒子中的自旋积累引起的。在Cr纳米粒子的情况下，获得的双结具有较低的样品电阻，显示出清晰的库仑阈值。

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