Novel Chiral Magnetic Domain Wall Structure in Fe/Ni/Cu(001) Films
Novel Chiral Magnetic Domain Wall Structure in Fe/Ni/Cu(001) Films
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Fe/Ni/Cu(001) 薄膜中的新型手性磁畴壁结构
DOI：
10.1103/physrevlett.110.177204
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发表时间：
2013-04-24
影响因子：
8.6
通讯作者：
Wu, Y. Z.
中科院分区：
文献类型：
--
作者：
Chen, G.;Zhu, J.;Wu, Y. Z.
使用自旋极化低能电子显微镜，我们在 Cu(100) 上外延生长的垂直磁化 Fe/Ni 双层中发现了一种新型畴壁结构。具体来说，我们在磁条相中观察到了意想不到的具有固定手性的尼尔型壁。此外，我们发现磁畴壁的手性由薄膜生长顺序决定，Fe/Ni双层中手性为右旋，Ni/Fe双层中手性为左旋，这表明潜在的机制是薄膜界面处的Dzyaloshinskii-Moriya相互作用。我们的观察可能开辟一条利用过渡金属异质结构中的界面工程控制手性自旋结构的新途径。 DOI:10.1103/PhysRevLett.110.177204
Using spin-polarized low energy electron microscopy, we discovered a new type of domain wall structure in perpendicularly magnetized Fe/Ni bilayers grown epitaxially on Cu(100). Specifically, we observed unexpected Neel-type walls with fixed chirality in the magnetic stripe phase. Furthermore, we find that the chirality of the domain walls is determined by the film growth order with the chirality being right handed in Fe/Ni bilayers and left handed in Ni/Fe bilayers, suggesting that the underlying mechanism is the Dzyaloshinskii-Moriya interaction at the film interfaces. Our observations may open a new route to control chiral spin structures using interfacial engineering in transition metal heterostructures. DOI:10.1103/PhysRevLett.110.177204