Spin wave excitations in honeycomb antiferromagnet MnTiO3

In Yong Hwang, Kee Hwan Lee, Jae Ho Chung, Kazuhiko Ikeuchi, V. Ovidiu Garlea, Hiroki Yamauchi, Mitsuhiro Akatsu, Shin Ichi Shamoto

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

Using inelastic neutron scattering, we investigate the spin wave excitations on the antiferromagnetic MnTiO3 (TN = 65 K), which has the stacked honeycomb structure. At T = 2 K, the spin wave energy extends up to 10.7 meV with the zone-center anisotropy gap of 0.8 meV. Whereas the dispersion is also strong along the direction perpendicular to the honeycomb planes, the exchange cancellation causes the magnetic interactions to be effectively anisotropic below TN. While the spin wave spectrum survives at temperatures above TN, we find that the magnetic interactions become more anisotropic within the paramagnetic phase. These results suggest that the magnetic interaction in MnTiO3 crosses over from being three dimensional to two dimensional above TN

原文English
文章編號064708
期刊Journal of the Physical Society of Japan
90
發行號6
DOIs
出版狀態Published - 2021

All Science Journal Classification (ASJC) codes

  • 物理與天文學 (全部)

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