Critical and reentrant behavior of the spin quantum 1/2 anisotropic Heisenberg antiferromagnet model with Dzyaloshinskii-Moriya interaction in a longitudinal magnetic field

Parente W. E. F., Pacobahyba J. T. M., Araujo I. G., Neto M. A., de Sousa J. R., AKINCI Ü.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, vol.355, pp.235-239, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 355
  • Publication Date: 2014
  • Doi Number: 10.1016/j.jmmm.2013.12.041
  • Journal Name: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.235-239
  • Keywords: Heisenberg model, Quantum systems, Dzyaloshinskii-Moriya interaction, ANTISYMMETRIC EXCHANGE, WEAK FERROMAGNETISM, PHASE-DIAGRAM, LINEAR-CHAIN, DYNAMICS, LA2CUO4, KCUF3, STATE
  • Dokuz Eylül University Affiliated: Yes

Abstract

In this paper we study the quantum spin-1/2 anisotropic Heisenberg antiferromagnet model in the presence of a Dzyaloshinskii-Moriya interaction (D) and a uniform longitudinal (H) magnetic held. Using the effective-held theory with a finite cluster N=2 spin (EFT-2) we calculate the phase diagrams in the H - T and D - T planes on a simple cubic lattice (z=6). We have only observed second order phase transitions for values between Delta is an element of [0, 1], where the cases were analysed: [sing (Delta = 1), anisotropic Heisenberg (Delta = 0.6) and isotropic Heisenberg (Delta = 0). Crown Copyright (C) 2014 Published by Elsevier B.V. All rights reserved.