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

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number064708
JournalJournal of the Physical Society of Japan
Volume90
Issue number6
DOIs
Publication statusPublished - 2021

Bibliographical note

Funding Information:
Acknowledgments This work was supported by the National Research Foundation (NRF) of Korea (Grant Nos. 2020R1A5A1016518 and 2020K1A3A7A09077712). K.I. thanks for the travel expense supprt from ISSP, Univ. Tokyo. This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. The authors acknowledge the support of the National Institute of Standards and Technology, U.S. Department of Commerce, in providing the neutron research facilities used in this work.

Funding Information:
This work was supported by the National Research Foundation (NRF) of Korea (Grant Nos. 2020R1A5A1016518 and 2020K1A3A7A09077712). K.I. thanks for the travel expense supprt from ISSP, Univ. Tokyo. This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. The authors acknowledge the support of the National Institute of Standards and Technology, U.S. Department of Commerce, in providing the neutron research facilities used in this work.

Publisher Copyright:
© 2021 The Physical Society of Japan.

ASJC Scopus subject areas

  • General Physics and Astronomy

Fingerprint

Dive into the research topics of 'Spin wave excitations in honeycomb antiferromagnet MnTiO3'. Together they form a unique fingerprint.

Cite this