paper

Magnetic Structure of the $S = 1/2$ Quasi-Two-Dimensional Square-Lattice Heisenberg Antiferromagnet Sr $_{2}$ CuTeO $_{6}$

arXiv:1602.03281 · doi:10.1103/PhysRevB.93.054426

Abstract

The magnetic structure of the double perovskite compound Sr $_{2}$ CuTeO $_{6}$ was determined from neutron powder diffraction data. This material is magnetically described as an $S = 1/2$ quasi-two-dimensional square-lattice Heisenberg model with antiferromagnetic nearest-neighbor and next-nearest-neighbor interactions. Sr $_{2}$ CuTeO $_{6}$ undergoes a magnetic phase transition at $T_{N} ≃ 29$ K. The spin structure below $T_{N}$ is NÃ©el antiferromagnetic on the square lattice, which means that the nearest-neighbor interaction ( $J_{1}$ ) is stronger than the next-nearest-neighbor interaction ( $J_{2}$ ), in contrast to other isostructural compounds such as Ba $_{2}$ CuWO $_{6}$ and Sr $_{2}$ CuWO $_{6}$ , for which $∣ J_{1} ∣ < ∣ J_{2} ∣$ is realized.

6 pages, 7 figures, to appear in Phys. Rev. B

Magnetic Structure of the S=1/2 Quasi-Two-Dimensional Square-Lattice Heisenberg Antiferromagnet Sr2​CuTeO6​

Abstract

Magnetic Structure of the $S = 1/2$ Quasi-Two-Dimensional Square-Lattice Heisenberg Antiferromagnet Sr $_{2}$ CuTeO $_{6}$