Magnetization Process of Kagome-Lattice Heisenberg Antiferromagnet

Understand

The magnetization process of the isotropic Heisenberg antiferromagnet on the kagome lattice is studied.

• Data obtained from the numerical-diagonalization method are reexamined from the viewpoint of the derivative of the magnetization with respect to the magnetic field.
• We find that the behavior of the derivative at approximately one-third of the height of the magnetization saturation is markedly different from that for the cases of typical magnetization plateaux.
• The magnetization process of the kagome-lattice antiferromagnet reveals a new phenomenon, which we call the "magnetization ramp".