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

Abstract

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 x y -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.