Ultradense Arrays of Sub-100 nm Co/CoO Nanodisks for Spintronics Applications
Ultradense Arrays of Sub-100 nm Co/CoO Nanodisks for Spintronics Applications
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DOI：
10.1021/acsanm.0c00052
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发表时间：
2020-05-22
影响因子：
5.9
通讯作者：
Monton, C.
中科院分区：
文献类型：
--
作者：
Morales, R.;Flores, A. N.;Monton, C.
亚100 nm铁磁/反铁磁纳米盘相对于它们的薄膜对应物表现出增强的磁性能。通过阳极氧化铝膜的转移、Co的电子束蒸发和随后的氧化为CoO的过程，大面积地制备了Co/CoO圆盘。在相同的氧化条件下，这种方法显示的交换偏置场比薄膜大4倍，并且具有更高的阻挡温度。磁性的显著改善归功于纳米结构中的有限尺寸效应，并可能在许多领域得到利用，如超高密度阵列的磁稳定或自旋电子现象中图案化异质结构的可伸缩过程。
Sub-100 nm ferromagnetic/antiferromagnetic nano-disks present enhanced magnetic properties with respect to their thin film counterparts. Co/CoO disks were fabricated over large areas by a transferring process of an anodic aluminum oxide membrane, electron beam evaporation of Co, and subsequent oxidation to CoO. This method reveals exchange bias fields up to 4 times larger than that in thin films and higher blocking temperatures for the same oxidation protocol. The significant improvement of the magnetic properties is attributed to finite-size effects in nanostructures and might be exploited in diverse areas such as the magnetic stabilization of ultradense arrays or the scalability process of patterned heterostructures in spintronic phenomena.