Magnetic structure and spin excitations in BaMn2Bi2

Calder, Stuart A.; Saparov, Bayrammurad I; Cao, H. B.; Niedziela, Jennifer L.; Lumsden, Mark D.; Sefat, Athena Safa; Christianson, Andrew D.

doi:10.1103/PhysRevB.89.064417

Title: Magnetic structure and spin excitations in BaMn₂Bi₂

Journal Article · Wed Feb 19 00:00:00 EST 2014 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.89.064417· OSTI ID:1163575

Calder, Stuart A. ^[1]; Saparov, Bayrammurad I ^[1]; Cao, H. B. ^[1]; Niedziela, Jennifer L. ^[1]; Lumsden, Mark D. ^[1]; Sefat, Athena Safa ^[1]; Christianson, Andrew D. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

We present a single crystal neutron scattering study of BaMn₂Bi₂, a recently synthesized material with the same ThCr₂Si₂type structure found in several Fe-based unconventional superconducting materials. We show long range magnetic order, in the form of a G-type antiferromagnetic structure, to exist up to 390 K with an indication of a structural transition at 100 K. Utilizing inelastic neutron scattering we observe a spin-gap of 16 meV, with spin-waves extending up to 55 meV. We find these magnetic excitations are well fit to a J₁-J₂-J_c Heisenberg model and present values for the exchange interactions. The spin wave spectrum appears to be unchanged by the 100 K structural phase transition.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1163575

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Vol. 89, Issue 6; ISSN 1098-0121

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 31 works

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References (17)

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Cited By (3)

Interplay of Dirac electrons and magnetism in CaMnBi2 and SrMnBi2 Zhang, Anmin; Liu, Changle; Yi, Changjiang Nature Communications, Vol. 7, Issue 1 https://doi.org/10.1038/ncomms13833	journal	December 2016
High-throughput prediction of the ground-state collinear magnetic order of inorganic materials using Density Functional Theory Horton, Matthew Kristofer; Montoya, Joseph Harold; Liu, Miao npj Computational Materials, Vol. 5, Issue 1 https://doi.org/10.1038/s41524-019-0199-7	journal	June 2019
Magnetic hexadecapole order and magnetopiezoelectric metal state in ${Ba}_{1 - x} K_{x} {Mn}_{2} {As}_{2}$ Watanabe, Hikaru; Yanase, Youichi Physical Review B, Vol. 96, Issue 6 https://doi.org/10.1103/physrevb.96.064432	journal	August 2017

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