Experimental realization of a spin-1/2 triangular-lattice Heisenberg antiferromagnet |
| |
| Authors: | Shirata Yutaka Tanaka Hidekazu Matsuo Akira Kindo Koichi |
| |
| Institution: | Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan. |
| |
| Abstract: | We report the results of magnetization and specific heat measurements on Ba{3}CoSb{2}O{9}, in which the magnetic Co{2+} ion has a fictitious spin 1/2, and provide evidence that a spin-1/2 Heisenberg antiferromagnet on a regular triangular lattice is actually realized in Ba{3}CoSb{2}O{9}. We found that the entire magnetization curve including the one-third quantum magnetization plateau is in excellent quantitative agreement with the results of theoretical calculations. We also found that Ba{3}CoSb{2}O{9} undergoes a three-step transition within a narrow temperature range. |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
|
