反铁磁体KFe₃(OH)₆(SO₄)₂在 Kagome晶格上存在三临界点。
Existence of a tricritical point in the antiferromagnet KFe3(OH)6(SO4)2 on a kagome lattice.
作者信息
Freitas A S, de Albuquerque Douglas F
机构信息
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.
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.
出版信息
Phys Rev E Stat Nonlin Soft Matter Phys. 2015 Jan;91(1):012117. doi: 10.1103/PhysRevE.91.012117. Epub 2015 Jan 9.
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.
我们使用平均场理论，针对具有Dzyaloshinskii-Moriya（DM）相互作用的反铁磁XY模型，研究了钾铁矾化合物KFe(3)(OH)(6)(SO(4))(2)在H-T平面上的相图，其中DM取不同值。在我们的方法中，我们得到了H-T平面上的三临界点，并且这种调整与实验数据有很强的相关性。
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