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Magnetization and structure of ultrathin Fe films

机译:超薄铁膜的磁化和结构

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The connection between magnetization and structure of ultrathin films is studied at room temperature for the case of Fe films on W(110) by inserting a 2-monolayer-thick growth-modifying Au layer between film and substrate using spin-polarized low-energy electron microscopy and low-energy electron diffraction. Ferromagnetic order with the easy axis pointing in the [110] direction appears upon percolation at 1.6 monolayers. Shortly thereafter, the easy axis rotates into the [001] direction. With further increasing thickness the magnetization oscillates between the [001] and the [110] direction with a maximum deviation from the [001] direction at seven monolayers where the magnetic signal has a maximum. The changes in the magnetization are associated with changes in the structure, strain, and morphology that are deduced from the diffraction patterns and which strongly influence the competition between interface anisotropy, magnetoelastic anisotropy, and dipolar surface anisotropy.
机译:对于W(110)上的Fe膜,通过使用自旋极化低能电子在膜和基底之间插入一个2层厚的生长改性Au层,研究了室温下磁化与超薄膜结构之间的关系。显微镜和低能电子衍射。在1.6单层渗流时,易磁轴指向[110]方向的铁磁序出现。此后不久,易轴便旋转到[001]方向。随着厚度的进一步增加,在磁信号具有最大的七个单层处,磁化在[001]方向和[110]方向之间以与[001]方向的最大偏差振荡。磁化强度的变化与结构,应变和形态的变化有关,这些变化是由衍射图样得出的,并且强烈影响界面各向异性,磁弹性各向异性和偶极表面各向异性之间的竞争。

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