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Number of results
2009 | 115 | 1 | 171-173

Article title

Heisenberg Model of a Ferromagnetic Monolayer Deposited on a Non-Magnetic Bulk Substrate

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EN

Abstracts

EN
A model describing a Heisenberg ferromagnetic monolayer (in a magnetic field) interacting with its non-magnetic bulk substrate is formulated. We use reduced-density operators to show that physical properties of the monolayer are affected by its interaction with the environment. Particularly the influence of the substrate lattice vibrations on the monolayer exchange parameter is examined. The Gaussian-type orbitals were used to calculate the distance dependence of the exchange parameter and the many-body Green functions to calculate the temperature dependence of the magnetization. Finally, the influence of the Debye temperature of the substrate on the magnetization of the monolayer is depicted. Although the resultant effect is not prominent, we state that interaction of ultrathin magnetic films with their environment has to be taken into account in the construction of the reduced-density operator.

Keywords

EN

Contributors

author
  • Quantum Physics Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

References

  • 1. Z. Jacyna-Onyszkiewicz, Physica A 305, 497 (2002)
  • 2. Z. Jacyna-Onyszkiewicz, The Principles of Quantum Thermodynamics, UAM, Poznań 1986 (in Polish)
  • 3. Z. Jacyna-Onyszkiewicz, A. Wierzbicki, Phys. Status Solidi B 188, K 17 (1995)
  • 4. R.J. Glauber, Phys. Rev. 98, 1692 (1995)
  • 5. W.J. Carr, Phys. Rev. 92, 1 (1953)
  • 6. D.C. Mattis, The Theory of Magnetism I, Springer, Berlin 1981, p. 60
  • 7. J. Kohanoff, Electronic Structure Calculations for Molecules and Solids, Cambridge University Press, Cambridge 2006, p. 196
  • 8. T. Helgaker, P. Jørgensen, J. Olsen, Molecular Electronic-Structure Theory, Wiley, Chichester 2000, p. 287
  • 9. P. Fröbrich, P.J. Kuntz, Phys. Rep. 432, 223 (2006)
  • 10. N.D. Mermin, H. Wagner, Phys. Rev. Lett. 17, 22 (1966)

Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.bwnjournal-article-appv115n1044kz
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