Experimental Realization of Spin-1/2 Triangular-Lattice Heisenberg Antiferromagnet

2011/10/18 by Yutaka Shirata, Hidekazu Tanaka, Akira Matsuo +1 · 1 citation
Physics and Astronomy · #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.108.057205

5 pages, 5 figures

arxiv created 2011/10/18 · arxiv updated 2015/05/29

Abstract

We report the results of magnetization and specific heat measurements on Ba₃CoSb₂O₉, in which the magnetic Co²⁺ ion has a fictitious spin-1/2, and show evidence that a spin-1/2 Heisenberg antiferromagnet on a regular triangular lattice is actually realized in Ba₃CoSb₂O₉. We found that the entire magnetization curve including the one-third quantum magnetization plateau is in excellent agreement with theoretical calculations at a quantitative level.

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