A drop of hyperfine field at Sn in Fe/Cr/Sn/Cr multilayers
A. K. Arzhnikov, L. V. Dobysheva, D. V. Fedorov, V. M. Uzdin
Abstract
The magnetism of the Fe/Cr/Sn/Cr multilayers was studied by first-principles functional theory. The calculations by LAPW and SKKR methods showed that two solutions exist in the Fe9/Cr14/Sn/Cr2 system. One of them is originated from the antiferromagnetic order in the bulk Cr, and the other is connected with incommensurate spin density wave (ISDW) in Cr. A characteristic feature of this system is realization of ISDW in the Cr film thinner than the half length period of a common ISDW in Cr. In the Cr layers with width lower than a quarter of the wave, the ISDW cannot be the cause of the sharp drop of the HFF at Sn. The calculations of the system Fe3/Cr8/Sn/Cr8 with and without allowance for the roughness at the Fe/Cr interface showed that the roughness leads to a significant decrease in the HFF at Sn.
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