Magnetic Properties of Ising-Like Heisenberg Antiferromagnets on the Triangular Lattice

抄録

Magnetic properties of Ising-like Heisenberg antiferromagnets on the triangular lattice are studied. In particular, the magnetization curve, M_z(H_z), and phase diagrams in (anisotropy, H_z) are studied in the ground state, where H_z is a magnetic field in an easy axis. Properties at finite temperatures are also studied, where four types of phases are found as well in the ground state. Non-trivial appearance of xy-components of magnetization has been found at finite magnetic field H_z. Difference between types of anisotropy, namely between a type with anisotropic coupling and a type with single-ion anisotropy, is also discussed.