title: Existence of a tricritical point in the antiferromagnet KFe3(OH)6(SO4)2 on a kagome lattice.
abstract: We study the phase diagram in the H-T plane of the potassium jarosite compound KFe(3)(OH)(6)(SO(4))(2) for the antiferromagnetic XY model with Dzyaloshinskii-Moriya (DM) interaction using the mean-field theory for different value of DM. In our approach, we obtain the tricritical point in the H-T plane and the adjustment has a strong correlation with experimental data.
authors: Departamento de Física, Universidade Federal de Sergipe, 49100-000 São Cristovão, SE, Brazil and Coordenadoria de Licenciatura em Física, Instituto Federal de Sergipe, 49400-000 Lagarto, SE, Brazil.
authors: A S
authors: AS
authors: Freitas
authors: Departamento de Física, Universidade Federal de Sergipe, 49100-000 São Cristovão, SE, Brazil and Departamento de Matemática, Universidade Federal de Sergipe, 49100-000 São Cristovão, SE, Brazil.
authors: Douglas F
authors: DF
authors: de Albuquerque