Magnetic and interface properties of Fe0.82Ni0.18/Co(001) superlattices
Magnetic and interface properties of Fe0.82Ni0.18/Co(001) superlattices
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DOI：
10.1088/0953-8984/23/5/055301
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发表时间：
2011-02-09
影响因子：
2.7
通讯作者：
Wappling, R.
中科院分区：
文献类型：
--
作者：
Kamali, S.;Haggstrom, L.;Wappling, R.
研究了FeNi层和Co层厚度相同的Fe0.82Ni0.18/Co超晶格的铁磁超精细场和界面混合的厚度关系。用[Fe0.82Ni0.18](1-x)Co-x合金的磁超精细场值建立的局域浓度模型解释了超晶格中的场分布和超晶格上的Co浓度分布。测定了无序[Fe0.82Ni0.18](1-x)Co-x和Fe1-xCox合金的Fe超精细场与Fe磁矩之间的关系。用两个费米接触项解释了磁超精细场：(I)与Fe磁矩成正比的中心电子项，其比例常数为-13T/mU B；(Ii)价电子项与Co浓度线性相关。除了1/1超晶格外，磁矩的方向都在样品平面内，其角度约为45度。
The thickness dependence of the Fe magnetic hyperfine field and the interfacial intermixing of Fe0.82Ni0.18/Co superlattices, with the same thickness for FeNi and Co layers, have been investigated. A local concentration model using the magnetic hyperfine field values from the [Fe0.82Ni0.18](1-x)Co-x alloys has been used to interpret the field distribution in the superlattices and the Co concentration profiles over the superlattices. A relationship between the Fe magnetic hyperfine field and the Fe magnetic moment has been determined for the unordered [Fe0.82Ni0.18](1-x)Co-x and Fe1-xCox alloys. The magnetic hyperfine fields have been explained using two Fermi contact terms: (i) the core electron term proportional to the Fe magnetic moment with a proportionality constant of -13 T/mu B and (ii) a valence electron term linearly dependent on the Co concentration. The direction of the magnetic moments is found to be in the sample plane except for the 1/1 superlattice, where an angle of about 45 degrees is found.