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On the mean-field theory of magnetic multilayers with bilinear and biquadratic Heisenberg exchange

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  • Lazarev, Svetislav
  • Škrinjar, Mario
  • Kapor, Darko
  • Stojanović, Stanoje

Abstract

A system consisting of several layers of magnetic ions interacting by both bilinear and biquadratic Heisenberg exchange is studied within the framework of the mean-field approximation. It is shown that for S=1 there exist two types of ordering: ferromagnetic and ferroquadrupolar. The stability of phases as the function of temperature, biquadratic exchange and surface exchange is discussed analytically and numerically and it was shown that similar to bulk samples there appear first- and second-order transitions and a tricritical point may appear depending on system parameters.

Suggested Citation

  • Lazarev, Svetislav & Škrinjar, Mario & Kapor, Darko & Stojanović, Stanoje, 1998. "On the mean-field theory of magnetic multilayers with bilinear and biquadratic Heisenberg exchange," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 250(1), pages 453-469.
    • Handle: RePEc:eee:phsmap:v:250:y:1998:i:1:p:453-469
    DOI: 10.1016/S0378-4371(97)00549-9
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