Title: Low-Temperature Competing Magnetic Energy Scales in the Topological Ferrimagnet ${\mathrm{TbMn}}_6{\mathrm{Sn}}_6$

Abstract

TbMn₆Sn₆ is a metallic ferrimagnet displaying signatures of both topological electrons and topological magnons arising from ferromagnetism and spin-orbit coupling within its Mn kagome layers. Inelastic neutron scattering measurements find strong ferromagnetic (FM) interactions within the Mn kagome layer and reveal a magnetic bandwidth of ~230 meV. The low-energy magnetic excitations are characterized by strong FM Mn-Mn and antiferromagnetic (AFM) Mn-Tb interlayer magnetic couplings. We observe weaker, competing long-range FM and AFM Mn-Mn interlayer interactions similar to those driving helical magnetism in the YMn₆Sn₆ system. Combined with density-functional theory calculations, we find that competing Mn-Mn interlayer magnetic interactions occur in all RMn₆Sn₆ compounds with R = Y, Gd-Lu, resulting in magnetic instabilities and tunability when Mn-R interactions are weak. In the case of TbMn₆Sn₆, strong AFM Mn-Tb coupling ensures a highly stable three-dimensional ferrimagnetic network

Authors:

Riberolles, S. X. M. ;

• Search DOE PAGES for author "Riberolles, S. X. M."
• Search DOE PAGES for ORCID "0000-0003-1597-7458"

Slade, Tyler J. ;

• Search DOE PAGES for author "Slade, Tyler J."
• Search DOE PAGES for ORCID "0000-0001-6751-4303"

Abernathy, D. L. ;

• Search DOE PAGES for author "Abernathy, D. L."
• Search DOE PAGES for ORCID "0000-0002-3533-003X"

Granroth, G. E. ;

• Search DOE PAGES for author "Granroth, G. E."
• Search DOE PAGES for ORCID "0000-0002-7583-8778"

Li, Bing ;

• Search DOE PAGES for author "Li, Bing"
• Search DOE PAGES for ORCID "0000-0002-3063-5344"

Lee, Y.; Canfield, P. C.; Ueland, B. G. ;

• Search DOE PAGES for author "Ueland, B. G."
• Search DOE PAGES for ORCID "0000-0001-9784-6595"

Ke, Liqin; McQueeney, R. J.

Publication Date:

Mon May 23 00:00:00 EDT 2022

Research Org.:

Ames Laboratory (AMES), Ames, IA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; Gordon and Betty Moore Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division

OSTI Identifier:

1869336

Alternate Identifier(s):

OSTI ID: 1870161; OSTI ID: 1870245; OSTI ID: 1872221

Report Number(s):

IS-J-10,808; IS-J-10,812
Journal ID: ISSN 2160-3308; PRXHAE; 021043

Grant/Contract Number:  

AC02-07CH11358; AC02-05CH11231; GBMF4411; AC05-00OR22725

Resource Type:

Published Article

Journal Name:

Physical Review. X

Additional Journal Information:

Journal Name: Physical Review. X Journal Volume: 12 Journal Issue: 2; Journal ID: ISSN 2160-3308

Publisher:

American Physical Society

Country of Publication:

United States

Language:

English

Subject:

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; first principles calculations; magnetic anisotropy; magnetic coupling; magnetic interactions; magnetic order; topological materials; first-principles calculations; magnetism; interactions and forces; phase transitions; order parameters