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

doi:10.7566/JPSJ.90.064708

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

Direct Geometry

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Using inelastic neutron scattering, we investigate the spin wave excitations on the antiferromagnetic MnTiO₃ (T_N = 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 T_N. While the spin wave spectrum survives at temperatures above T_N, we find that the magnetic interactions become more anisotropic within the paramagnetic phase.

Original language	English
Article number	064708
Journal	Journal of the Physical Society of Japan
Volume	90
Issue number	6
DOIs	https://doi.org/10.7566/JPSJ.90.064708
State	Published - 2021

Funding

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. 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.

Funders	Funder number
National Institute of Standards and Technology
U.S. Department of Commerce
Office of Science
Oak Ridge National Laboratory
National Research Foundation of Korea	2020K1A3A7A09077712, 2020R1A5A1016518
Institute of Solid State Physics, Chinese Academy of Sciences

Access to Document

10.7566/JPSJ.90.064708

Cite this

@article{c0b9ca2bca524740891e4d5744e4eaeb,

title = "Spin wave excitations in honeycomb antiferromagnet MnTiO3",

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.",

author = "Hwang, {In Yong} and Lee, {Kee Hwan} and Chung, {Jae Ho} and Kazuhiko Ikeuchi and Garlea, {V. Ovidiu} and Hiroki Yamauchi and Mitsuhiro Akatsu and Shamoto, {Shin Ichi}",

note = "Publisher Copyright: {\textcopyright} 2021 The Physical Society of Japan.",

year = "2021",

doi = "10.7566/JPSJ.90.064708",

language = "English",

volume = "90",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "6",

}

TY - JOUR

T1 - Spin wave excitations in honeycomb antiferromagnet MnTiO3

AU - Hwang, In Yong

AU - Lee, Kee Hwan

AU - Chung, Jae Ho

AU - Ikeuchi, Kazuhiko

AU - Garlea, V. Ovidiu

AU - Yamauchi, Hiroki

AU - Akatsu, Mitsuhiro

AU - Shamoto, Shin Ichi

PY - 2021

Y1 - 2021

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85107626066&partnerID=8YFLogxK

U2 - 10.7566/JPSJ.90.064708

DO - 10.7566/JPSJ.90.064708

M3 - Article

AN - SCOPUS:85107626066

SN - 0031-9015

VL - 90

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 6

M1 - 064708

ER -

Spin wave excitations in honeycomb antiferromagnet MnTiO₃

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this