论文标题
与交换相互作用的铁磁颗粒的集合和磁各向异性的随机轴
Tunneling magnetoresistance in ensembles of ferromagnetic granules with exchange interaction and random easy axes of magnetic anisotropy
论文作者
论文摘要
我们研究了颗粒之间的交换相互作用，研究了具有随机的磁各向异性轴的铁磁颗粒的集合中的隧道磁力。结果表明，由于交换相互作用，磁化值有效地与磁化磁化有效，即在磁化磁化几乎饱和的场上可以观察到最强的负磁场抗性。在某些条件下，可以逆转磁磁性的迹象，并且在某些磁场上隧穿的磁磁性可能会变为正。我们的理论与SICXNY矩阵中Fe颗粒的集合中的磁倍率的测量一致。
We study the tunneling magnetoresistance in the ensembles of ferromagnetic granules with random easy axes of magnetic anisotropy taking into account the exchange interaction between granules. It is shown that due to the exchange interaction magnetoresistance is effectively decoupled from magnetization, i.e. the strongest negative magnetoresistance can be observed at the field where magnetization is almost saturated. Under some conditions, the sign of magnetoresistance can be reversed and tunneling magnetoresistance can become positive at certain magnetic fields. Our theory agrees with measurements of magnetoresistance in ensembles of Fe granules in SiCxNy matrix.
