Magnetic exchange interactions in the van der Waals layered antiferromagnet Mn PSe3

S. Calder; A. V. Haglund; A. I. Kolesnikov; D. Mandrus

doi:10.1103/PhysRevB.103.024414

Magnetic exchange interactions in the van der Waals layered antiferromagnet Mn PSe3

S. Calder, A. V. Haglund, A. I. Kolesnikov, D. Mandrus

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Abstract

Two-dimensional van der Waals compounds with magnetic ions on a honeycomb lattice are hosts to a variety of exotic behavior. The magnetic interactions in one such compound, MnPSe3, are investigated with elastic and inelastic neutron scattering. Magnetic excitations are observed in the magnetically ordered regime and persist to temperatures well above the ordering temperature, TN=74K, consistent with low dimensional magnetic interactions. The inelastic neutron scattering results allow a model spin Hamiltonian to be presented that includes dominant intralayer interactions of J1ab=0.45 meV, J2ab=0.03 meV, J3ab=0.19 meV, consistent with theoretical predictions. Despite the quasi-2D behavior, appreciable interlayer interactions of Jc=0.031(5) meV are required to model the data. No evidence for anisotropy in the form of a spin gap is observed in the data collected. The measurements on MnPSe3 are contrasted with those on MnPS3 and reveal a large increase in the interlayer exchange interaction in MnPSe3 that may stabilize the similar ordering temperatures in the bulk compounds.

Original language	English
Article number	024414
Journal	Physical Review B
Volume	103
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.103.024414
State	Published - Jan 11 2021

Funding

This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paidup, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doepublic-access-plan ). This research used resources at the High Flux Isotope Reactor and Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. D.M. acknowledges support from the Gordon and Betty Moore Foundation's EPiQS Initiative, Grant No. GBMF9069.

Funders	Funder number
U.S. Department of Energy
Gordon and Betty Moore Foundation	GBMF9069

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10.1103/PhysRevB.103.024414

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title = "Magnetic exchange interactions in the van der Waals layered antiferromagnet Mn PSe3",

abstract = "Two-dimensional van der Waals compounds with magnetic ions on a honeycomb lattice are hosts to a variety of exotic behavior. The magnetic interactions in one such compound, MnPSe3, are investigated with elastic and inelastic neutron scattering. Magnetic excitations are observed in the magnetically ordered regime and persist to temperatures well above the ordering temperature, TN=74K, consistent with low dimensional magnetic interactions. The inelastic neutron scattering results allow a model spin Hamiltonian to be presented that includes dominant intralayer interactions of J1ab=0.45 meV, J2ab=0.03 meV, J3ab=0.19 meV, consistent with theoretical predictions. Despite the quasi-2D behavior, appreciable interlayer interactions of Jc=0.031(5) meV are required to model the data. No evidence for anisotropy in the form of a spin gap is observed in the data collected. The measurements on MnPSe3 are contrasted with those on MnPS3 and reveal a large increase in the interlayer exchange interaction in MnPSe3 that may stabilize the similar ordering temperatures in the bulk compounds.",

author = "S. Calder and Haglund, {A. V.} and Kolesnikov, {A. I.} and D. Mandrus",

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AU - Calder, S.

AU - Haglund, A. V.

AU - Kolesnikov, A. I.

AU - Mandrus, D.

PY - 2021/1/11

Y1 - 2021/1/11

N2 - Two-dimensional van der Waals compounds with magnetic ions on a honeycomb lattice are hosts to a variety of exotic behavior. The magnetic interactions in one such compound, MnPSe3, are investigated with elastic and inelastic neutron scattering. Magnetic excitations are observed in the magnetically ordered regime and persist to temperatures well above the ordering temperature, TN=74K, consistent with low dimensional magnetic interactions. The inelastic neutron scattering results allow a model spin Hamiltonian to be presented that includes dominant intralayer interactions of J1ab=0.45 meV, J2ab=0.03 meV, J3ab=0.19 meV, consistent with theoretical predictions. Despite the quasi-2D behavior, appreciable interlayer interactions of Jc=0.031(5) meV are required to model the data. No evidence for anisotropy in the form of a spin gap is observed in the data collected. The measurements on MnPSe3 are contrasted with those on MnPS3 and reveal a large increase in the interlayer exchange interaction in MnPSe3 that may stabilize the similar ordering temperatures in the bulk compounds.

AB - Two-dimensional van der Waals compounds with magnetic ions on a honeycomb lattice are hosts to a variety of exotic behavior. The magnetic interactions in one such compound, MnPSe3, are investigated with elastic and inelastic neutron scattering. Magnetic excitations are observed in the magnetically ordered regime and persist to temperatures well above the ordering temperature, TN=74K, consistent with low dimensional magnetic interactions. The inelastic neutron scattering results allow a model spin Hamiltonian to be presented that includes dominant intralayer interactions of J1ab=0.45 meV, J2ab=0.03 meV, J3ab=0.19 meV, consistent with theoretical predictions. Despite the quasi-2D behavior, appreciable interlayer interactions of Jc=0.031(5) meV are required to model the data. No evidence for anisotropy in the form of a spin gap is observed in the data collected. The measurements on MnPSe3 are contrasted with those on MnPS3 and reveal a large increase in the interlayer exchange interaction in MnPSe3 that may stabilize the similar ordering temperatures in the bulk compounds.

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Magnetic exchange interactions in the van der Waals layered antiferromagnet Mn PSe3

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