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Critical Temperatures of Random Iron–Cobalt Overlayers on the fcc-Cu(001) Substrate

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Abstract

We have theoretically investigated thermodynamic properties of random iron–cobalt monolayer deposited on the fcc(001) face of copper. The effective two-dimensional Heisenberg Hamiltonian was constructed from first principles and used to estimate the Curie temperature. The random-phase approximation as well as Monte Carlo approach are used and critically compared. Calculations indicate a weak maximum of the Curie temperature for Fe-rich composition of the overlayer.

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Acknowledgements

The authors acknowledge the support from the Czech Science Foundation under Contract No. 202/09/0775. L. B. acknowledges the support from the Swedish e-Science Research Centre (SeRC) and Swedish Research Council (VR).

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Authors and Affiliations

  1. Institute of Physics, Academy of Science of the Czech Republic, Na Slovance 2, 182 21, Prague 8, Czech Republic

    Martin Mašín, Josef Kudrnovský, Miroslav Kotrla & Václav Drchal

  2. Department of Materials Science and Engineering, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden

    Lars Bergqvist

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  1. Martin Mašín
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  2. Lars Bergqvist
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  3. Josef Kudrnovský
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  4. Miroslav Kotrla
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  5. Václav Drchal
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Correspondence to Miroslav Kotrla.

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Mašín, M., Bergqvist, L., Kudrnovský, J. et al. Critical Temperatures of Random Iron–Cobalt Overlayers on the fcc-Cu(001) Substrate. J Supercond Nov Magn 26, 809–812 (2013). https://doi.org/10.1007/s10948-012-2084-1

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  • DOI: https://doi.org/10.1007/s10948-012-2084-1

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