ANISOTROPY INFLUENCE ON THE STRIPED ANTIFERROMAGNETISM OF A FRUSTRATED HEISENBERG MODEL: AN APPLICATION TO IRON PNICTIDE MATERIALS

Authors

  • Мilan Pantić University of Novi Sad, Faculty of Sciences, Department of Physics, Trg Dositeja Obradovića 4, Novi Sad, Serbia
  • Milica Rutonjski University of Novi Sad, Faculty of Sciences, Department of Physics, Trg Dositeja Obradovića 4, Novi Sad, Serbia
  • Petar Mali University of Novi Sad, Faculty of Sciences, Department of Physics, Trg Dositeja Obradovića 4, Novi Sad, Serbia
  • Milica Pavkov Hrvojević University of Novi Sad, Faculty of Sciences, Department of Physics, Trg Dositeja Obradovića 4, Novi Sad, Serbia
  • Slobodan Radošević University of Novi Sad, Faculty of Sciences, Department of Physics, Trg Dositeja Obradovića 4, Novi Sad, Serbia

DOI:

https://doi.org/10.7251/cm.v2i7.4231

Abstract

Motivated by several experimental studies of magnetic compounds related to iron pnictides, we examine thermodynamic properties of anisotropic J1a - J1b - Jc - J2 Heisenberg antiferromagnetic model. Our calculations are based on the two-time temperature Green's functions within several well-known decoupling approximations. We obtain excitation spectrum, correlation functions and the analytic expression for the critical temperature and compare our results to the existing experimental data. Results presented here could be of a great importance in the further investigations of similar magnetic systems.

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Published

2017-12-29