Eur. Phys. J. B 24, 211-220 (2001)
https://doi.org/10.1007/s100510170008

The magnetization process in the 2-dimensional J1-J2 model

Physics Department, University of Wuppertal, 42097 Wuppertal, Germany

Corresponding author: ^a fledderj@theorie.physik.uni-wuppertal.de

Received: 10 August 2001
Revised: 28 September 2001
Published online: 15 November 2001

Abstract

We study the -dependence of the magnetization process in the J₁-J₂ model on a square lattice with frustrating couplings J₂ along the diagonals. Perturbation expansions around and yield an adequate description of the magnetization curve in the antiferromagnetic and collinear antiferromagnetic phase, respectively. The transition from one phase to the other () leaves pronounced structures in the longitudinal and transverse structure factors at and .