Anomalous behavior of the magnetization process of the =1/2 kagome-lattice Heisenberg antiferromagnet at one-third height of the saturation

Nakano, Hiroki*; Sakai, Toru

The magnetization process of the =1/2 Heisenberg antiferromagnet on the kagome lattice is studied by the numerical diagonalization method. We successfully obtain a new result of the magnetization process of a 42-site cluster in the entire range. Our analysis clarifies that the critical behavior around one-third of the height of the saturation is different from the typical behavior of the well-known magnetization plateau in two-dimensional systems.