Spin-polarized scanning tunneling microscopy study of 360° walls in an external magnetic field -: art. no. 020401
Spin-polarized scanning tunneling microscopy study of 360° walls in an external magnetic field -: art. no. 020401
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DOI：
10.1103/physrevb.67.020401
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发表时间：
2003-01-01
影响因子：
3.7
通讯作者：
Wiesendanger, R
中科院分区：
文献类型：
--
作者：
Kubetzka, A;Pietzsch, O;Wiesendanger, R
利用自旋极化扫描隧道显微镜研究了在W(110)衬底上制备的超薄Fe纳米线中360度磁畴壁的内部结构。它们是由成对的180度绕组壁在不断增加的外部磁场中形成的。它们的宽度由交换和塞曼能量的平衡决定。在相关磁场范围内(大于或等于50mT)，退磁能量仅通过增加壁宽间接贡献，即有效各向异性减小，非局域效应可以忽略不计。
Spin-polarized scanning tunneling microscopy is employed to study the internal structure of 360degrees magnetic domain walls in ultrathin Fe nanowires prepared on W(110). They are formed by pairs of winding 180degrees walls in an increasing external magnetic field. Their width is governed by an equilibrium of exchange and Zeeman energy. In the relevant field range (Bgreater than or equal to50 mT) the demagnetizing energy contributes only indirectly via an increased wall width, i.e., a reduced effective anisotropy, and nonlocal effects are negligible.