Growth and magnetic domain structure of ultrathin Fe films on Rh(001)
Growth and magnetic domain structure of ultrathin Fe films on Rh(001)
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DOI：
10.1103/physrevb.91.184412
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发表时间：
2015-05-20
影响因子：
3.7
通讯作者：
Bode, Matthias
中科院分区：
文献类型：
--
作者：
Kemmer, Jeannette;Wilfert, Stefan;Bode, Matthias
用自旋极化扫描隧道显微镜(SP-STM)研究了低温(T=5.5K)面心立方(FCC)Rh(001)衬底上外延生长的Fe超薄膜的生长和磁畴结构。结果表明，在Rh(001)衬底上采用的清洗工艺对形成干净有序的Fe膜起着重要作用。铁单分子膜具有平面外反铁磁性c(2x2)自旋结构。发现第二Fe层的岛是平面外的铁磁性的。双层岛的合并导致形成更大的磁区，这些磁区延伸到数百纳米以上，形成封闭的两层薄膜。进一步增加Fe的覆盖度，减小了磁区尺寸，形成了由表面/界面竞争和形状各向异性驱动的条形磁区图案。
The growth and magnetic domain structure of ultrathin Fe films epitaxially grown on face-centered cubic (fcc) Rh(001) is investigated by spin-polarized scanning tunneling microscopy (SP-STM) at low temperatures (T = 5.5K). Our results indicate that the cleaning procedure applied to the Rh(001) substrate plays an important role for the formation of a clean and well-ordered Fe film. The Fe monolayer exhibits an out-of-plane antiferromagnetic c(2 x 2) spin structure. Islands of the second Fe layer are found to be out-of-plane ferromagnetic. Coalescence of the double-layer islands results in the formation of larger domains, which extend over several hundred nanometers for a closed two layer film. Further increasing the Fe coverage leads to a reduction of the domain size and the formation of patterns that are reminiscent of stripe domains driven by the competition of surface/interface and shape anisotropy.