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- W2053284843 abstract "The exchange coupling J between Fe layers separated by nonmagnetic Cr is calculated for Fe/Cr/Fe (001) trilayer structures as a function of the spacer thickness N for several temperatures $T$. It is shown that for perfectly sharp interfaces $J(N,T)$ is entirely dominated by short period oscillations for $0 mathrm{K}<~T<~500 mathrm{K}$ and N varying from $5$ to $50$ atomic planes. At zero temperature the amplitude of J decays as ${N}^{ensuremath{-}3/2}$ for large values of $N.$ This behavior is caused by the particular type of singularity in the nesting of the Cr Fermi which is responsible for one of the dominant short-period oscillations of $J(N)$. A strong temperature dependence of the coupling strength is obtained for some values of $N,$ in excellent agreement with experiments. The effect of interface mixing on $J(N)$ reduces the overall coupling strength, as well as the relative importance of the short period oscillatory components, and causes a phase shift in the oscillations of $J(N).$" @default.
- W2053284843 created "2016-06-24" @default.
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- W2053284843 date "1999-05-01" @default.
- W2053284843 modified "2023-09-26" @default.
- W2053284843 title "Oscillatory exchange coupling between iron layers separated by chromium" @default.
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- W2053284843 doi "https://doi.org/10.1103/physrevb.59.11424" @default.
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