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首页> 外文期刊>IEEE Transactions on Magnetics >Magnetic Transport Mechanism in Double Ferromagnetic Tunnel Junctions With Two-Dimensional Ferromagnetic Particles
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Magnetic Transport Mechanism in Double Ferromagnetic Tunnel Junctions With Two-Dimensional Ferromagnetic Particles

机译：二维铁磁粒子在双铁磁隧道结中的磁输运机理

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摘要

Magnetic transport properties of Co{sub}90Fe{sub}10/AlO{sub}x/Co{sub}90Fe{sub}10/AlO{sub}x/Co{sub}90Fe{sub}10 ferromagnetic double tunnel junctions have been investigated with respect to the thermal fluctuation. A middle Co{sub}90Fe{sub}10 layer is discontinuous by forming Co{sub}90Fe{sub}10 particles two-dimension-ally, which shows superparamagnetic behavior above 80 K. The average diameter of the Co{sub}90Fe{sub}10 particles is estimated to be 4.8-5.0 nm from both a magnetization curve at room temperature and temperature dependence of coercivities deduced from magnetoresistance curves. This finding agrees with the maximum diameter (5.2 nm) evaluated from cross-sectional transmission electron microscope images, revealing that the dominant electron transport process heavily depends on the largest particles.
机译：Co {sub} 90Fe {sub} 10 / AlO {sub} x / Co {sub} 90Fe {sub} 10 / AlO {sub} x / Co {sub} 90Fe {sub} 10Fe铁双隧道结的磁输运性质具有已经针对热波动进行了研究。通过以二维方式形成Co {sub} 90Fe {sub} 10颗粒二维，中间的Co {sub} 90Fe {sub} 10层是不连续的，这表明在80 K以上具有超顺磁行为。Co{sub} 90Fe的平均直径根据室温下的磁化曲线和由磁阻曲线推导的矫顽力的温度依赖性，{sub} 10个粒子估计为4.8-5.0 nm。这一发现与横截面透射电子显微镜图像评估的最大直径（5.2 nm）一致，表明主要的电子传输过程很大程度上取决于最大的颗粒。

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