Author(s):
1. Milan Pantić, Univerzitet u Novom Sadu, Prirodno-matematički fakultet, Departman za fiziku, Serbia
2. Petar Mali, Univerzitet u Novom Sadu, Prirodno-matematički fakultet, Departman za fiziku, Serbia
3. Milica Pavkov-Hrvojević, Univerzitet u Novom Sadu, Prirodno-matematički fakultet, Departman za fiziku, Serbia
4. Slobodan Radošević, Univerzitet u Novom Sadu, Prirodno-matematički fakultet, Departman za fiziku, Serbia

Abstract:
Motivated by several experimental studies of magnetic compounds related to iron pnictides, we examine thermodynamic properties of anisotropic J1a - J1b - Jc - J2 Heisenberg antiferomagnetic model. Our calculations are based on 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 with existing experimental data. Results presented here could be of great importance futher investigations of similar magnetic systems.

Key words:
Frustrate Heisenberg J1a - J1b - Jc - J2 antiferromagnet,Iron pnictides,Spin and single-ion anisotropy

Thematic field:
SYMPOSIUM B - Biomaterials and nanomedicine

Date of abstract submission:
05.07.2016.

Conference:
Contemporary Materials 2016 - Savremeni Materijali