Tunable magnetism on the lateral mesoscale by post-processing of Co/Pt heterostructures.
Tunable magnetism on the lateral mesoscale by post-processing of Co/Pt heterostructures.
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DOI：
10.3762/bjnano.6.109
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发表时间：
2015
影响因子：
3.1
通讯作者：
Huth M
中科院分区：
文献类型：
--
作者：
Dobrovolskiy OV;Kompaniiets M;Sachser R;Porrati F;Gspan C;Plank H;Huth M
在纳米尺度上控制磁性对于微磁性和自旋相关输运的基础研究以及磁记录、成像和传感等各种应用都是至关重要的。这在很大程度上是通过垂直方向上的分层异质结构实现的。在这里，我们提出了一种互补的方法，它允许在横向介观尺度上对Co/PT异质结构的磁性进行控制调节。通过对聚焦电子束诱导沉积(FEBID)制备的铂基和钴基纳米条带的原位后处理，我们能够局部调节它们的矫顽场和剩余磁化强度。虽然单一的Co-FeBID纳米条没有表现出磁滞现象，但我们发现处理后的Co/Pt纳米条具有硬磁行为，矫顽场高达850 Oe。我们将观察到的效应归因于局域控制的CoPT L10相的形成，透射电子显微镜已经揭示了它的存在。
Controlling magnetic properties on the nanometer-scale is essential for basic research in micro-magnetism and spin-dependent transport, as well as for various applications such as magnetic recording, imaging and sensing. This has been accomplished to a very high degree by means of layered heterostructures in the vertical dimension. Here we present a complementary approach that allows for a controlled tuning of the magnetic properties of Co/Pt heterostructures on the lateral mesoscale. By means of in situ post-processing of Pt- and Co-based nano-stripes prepared by focused electron beam induced deposition (FEBID) we are able to locally tune their coercive field and remanent magnetization. Whereas single Co-FEBID nano-stripes show no hysteresis, we find hard-magnetic behavior for post-processed Co/Pt nano-stripes with coercive fields up to 850 Oe. We attribute the observed effects to the locally controlled formation of the CoPt L10 phase, whose presence has been revealed by transmission electron microscopy.
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影响因子：
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