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Tunnelling magnetoresistance in disordered interacting nanoparticles

机译:相互作用的无序纳米粒子中的隧穿磁阻

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摘要

Tunnelling magnetoresistance (TMR) of three-dimensional disordered ferromagnetic nanoparticles has been studied based on the Monte Carlo (MC) simulations. The dipolar interaction as well as the exchange coupling between the particles are carefully considered. It is found that the maximum TMR is nearly independent of the dipolar interaction, while it decreases with an increasing exchange interaction. The numerical results also reveal that the magnetic field sensitivity of the TMR depends not only on the interactions but also on the distributions of the anisotropy axes.
机译:基于蒙特卡洛(MC)模拟研究了三维无序铁磁纳米粒子的隧穿磁阻(TMR)。仔细考虑了偶极相互作用以及颗粒之间的交换耦合。发现最大TMR几乎与偶极相互作用无关,而随着交换相互作用的增加而减小。数值结果还表明,TMR的磁场灵敏度不仅取决于相互作用,而且取决于各向异性轴的分布。

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