Electronic and structural properties of Mn/Cu superstructures
Electronic and structural properties of Mn/Cu superstructures
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Mn/Cu超结构的电子和结构特性
DOI：
10.1103/physrevb.61.4948
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发表时间：
2000
影响因子：
3.7
通讯作者：
M. Asensio
中科院分区：
文献类型：
--
作者：
Y. Huttel;F. Schiller;J. Avila;M. Asensio
本文研究了Mn/Cu/Mn/Cu板坯的生长。利用x射线光电子衍射和低能电子衍射技术研究了原位生长多层膜的原子短程有序和中程有序。补充结果给出的电子结构和本地磁矩的核心水平[X射线光电子能谱（XPS）]，价态水平（紫外光电子能谱），和软X射线吸收测量。在c（2× 2）Mn/Cu（100）体系上，Cu覆盖层的生长是有序的，形成面心立方结构。我们还发现了在p（1× 1）Cu/c（2 × 2）Mn/Cu（100）系统上生长第二个二维c（2 × 2）Mn/Cu合金的证据，因此，打开了由多个c（2× 2）Mn/p（1× 1）Cu单元组成的多层膜的可能性。第一和第二个二维磁性合金的锰原子被发现是在高自旋基态的Mn/Cu/Mn/Cu板，并提出了相同的XPS功能，而在价带中的电子结构的调查显示略有差异。
We present a study of the growth of Mn/Cu/Mn/Cu slabs. The atomic short-and medium-range orders of the in situ grown multilayers have been investigated using x-ray photoelectron diffraction in the forward regime and low-energy electron diffraction techniques. Complementary results are given on the electronic structure and local magnetic moment by core level [x-ray photoelectron spectroscopy (XPS)], valence level (ultraviolet photoemission spectroscopy), and soft x-ray absorption measurements. The growth of copper overlayers on the c (2× 2) M n/C u (100) system is found to be ordered, producing a fcc structure. We also show evidence on the growth of a second two-dimensional c (2× 2) M n/C u alloy on top of the p (1× 1) Cu/c (2× 2) M n/C u (100) system, opening, therefore, the possibility of growing multilayers made of several c (2× 2) Mn/p (1× 1) Cu units. The manganese atoms of the first and second two-dimensional magnetic alloys are found to be in a high-spin ground state in the Mn/Cu/Mn/Cu slabs and present the same XPS features, whereas the electronic structure investigated in the valence band shows slight differences.