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Title: Magnetic excitations in the quasi-two-dimensional ferromagnet Fe 3 - x GeTe 2 measured with inelastic neutron scattering

Abstract

Fe3-xGeTe2 is an itinerant ferromagnet made up of of two-dimensional layers weakly connected by van der Waals bonding that shows a variety of intriguing phenomena. Inelastic neutron scattering measurements on bulk single crystals of Fe2.75GeTe2 were performed to quantify the magnetic exchange interaction energies and anisotropy. The observed inelastic excitations, which extend to a maximum energy of ~75 meV, are indicative of dominant in-plane correlations with negligible magnetic interactions between the layers. A spin gap of 3.7 meV is observed, allowing a measure of the magnetic anisotropy. The excitations are damped, reflective of both the magnetic site occupancy reduction of 25% on one Fe sublattice and the itinerant interactions. A minimal model is employed to describe the excitation spectra and extract magnetic exchange interaction values. The temperature evolution of the excitations are probed and correlations shown to persist above Tc, further indicating the low-dimensional nature of the magnetism.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1506797
Alternate Identifier(s):
OSTI ID: 1501699
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; Journal Issue: 9; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Calder, S., Kolesnikov, A. I., and May, A. F. Magnetic excitations in the quasi-two-dimensional ferromagnet Fe3-xGeTe2 measured with inelastic neutron scattering. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.99.094423.
Calder, S., Kolesnikov, A. I., & May, A. F. Magnetic excitations in the quasi-two-dimensional ferromagnet Fe3-xGeTe2 measured with inelastic neutron scattering. United States. https://doi.org/10.1103/PhysRevB.99.094423
Calder, S., Kolesnikov, A. I., and May, A. F. Mon . "Magnetic excitations in the quasi-two-dimensional ferromagnet Fe3-xGeTe2 measured with inelastic neutron scattering". United States. https://doi.org/10.1103/PhysRevB.99.094423. https://www.osti.gov/servlets/purl/1506797.
@article{osti_1506797,
title = {Magnetic excitations in the quasi-two-dimensional ferromagnet Fe3-xGeTe2 measured with inelastic neutron scattering},
author = {Calder, S. and Kolesnikov, A. I. and May, A. F.},
abstractNote = {Fe3-xGeTe2 is an itinerant ferromagnet made up of of two-dimensional layers weakly connected by van der Waals bonding that shows a variety of intriguing phenomena. Inelastic neutron scattering measurements on bulk single crystals of Fe2.75GeTe2 were performed to quantify the magnetic exchange interaction energies and anisotropy. The observed inelastic excitations, which extend to a maximum energy of ~75 meV, are indicative of dominant in-plane correlations with negligible magnetic interactions between the layers. A spin gap of 3.7 meV is observed, allowing a measure of the magnetic anisotropy. The excitations are damped, reflective of both the magnetic site occupancy reduction of 25% on one Fe sublattice and the itinerant interactions. A minimal model is employed to describe the excitation spectra and extract magnetic exchange interaction values. The temperature evolution of the excitations are probed and correlations shown to persist above Tc, further indicating the low-dimensional nature of the magnetism.},
doi = {10.1103/PhysRevB.99.094423},
journal = {Physical Review B},
number = 9,
volume = 99,
place = {United States},
year = {2019},
month = {3}
}

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Works referenced in this record:

Experimental observation of the quantum Hall effect and Berry's phase in graphene
journal, November 2005

  • Zhang, Yuanbo; Tan, Yan-Wen; Stormer, Horst L.
  • Nature, Vol. 438, Issue 7065, p. 201-204
  • DOI: 10.1038/nature04235

The magnon dynamics and spin exchange parameters of FePS 3
journal, September 2012


Mantid—Data analysis and visualization package for neutron scattering and μ SR experiments
journal, November 2014

  • Arnold, O.; Bilheux, J. C.; Borreguero, J. M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 764
  • DOI: 10.1016/j.nima.2014.07.029

Itinerant Magnetic Excitations in Antiferromagnetic CaFe 2 As 2
journal, May 2009


Gate-tunable room-temperature ferromagnetism in two-dimensional Fe3GeTe2
journal, October 2018


Two-dimensional itinerant ferromagnetism in atomically thin Fe3GeTe2
journal, August 2018


Magnetic correlations in the quasi-two-dimensional semiconducting ferromagnet CrSiTe 3
journal, October 2015


Electronic correlation and magnetism in the ferromagnetic metal Fe 3 GeTe 2
journal, April 2016


Visualization and manipulation of magnetic domains in the quasi-two-dimensional material F e 3 GeT e 2
journal, January 2018


SEQUOIA: A Newly Operating Chopper Spectrometer at the SNS
journal, November 2010


Spin waves and magnetic exchange interactions in CaFe2As2
journal, July 2009

  • Zhao, Jun; Adroja, D. T.; Yao, Dao-Xin
  • Nature Physics, Vol. 5, Issue 8
  • DOI: 10.1038/nphys1336

A comparison of four direct geometry time-of-flight spectrometers at the Spallation Neutron Source
journal, April 2014

  • Stone, M. B.; Niedziela, J. L.; Abernathy, D. L.
  • Review of Scientific Instruments, Vol. 85, Issue 4
  • DOI: 10.1063/1.4870050

Fe3GeTe2 and Ni3GeTe2 – Two New Layered Transition-Metal Compounds: Crystal Structures, HRTEM Investigations, and Magnetic and Electrical Properties
journal, April 2006

  • Deiseroth, Hans-Jörg; Aleksandrov, Krasimir; Reiner, Christof
  • European Journal of Inorganic Chemistry, Vol. 2006, Issue 8
  • DOI: 10.1002/ejic.200501020

Spin waves and magnetic exchange interactions in insulating Rb0.89Fe1.58Se2
journal, September 2011

  • Wang, Miaoyin; Fang, Chen; Yao, Dao-Xin
  • Nature Communications, Vol. 2, Issue 1
  • DOI: 10.1038/ncomms1573

Magnetic exchange parameters and anisotropy of the quasi-two-dimensional antiferromagnet NiPS 3
journal, October 2018


Large anomalous Hall current induced by topological nodal lines in a ferromagnetic van der Waals semimetal
journal, July 2018


Crystal and Magnetic Structures in Layered, Transition Metal Dihalides and Trihalides
journal, April 2017


Magnetic structure and magnon dynamics of the quasi-two-dimensional antiferromagnet FePS 3
journal, December 2016


Design and operation of the wide angular-range chopper spectrometer ARCS at the Spallation Neutron Source
journal, January 2012

  • Abernathy, D. L.; Stone, M. B.; Loguillo, M. J.
  • Review of Scientific Instruments, Vol. 83, Issue 1
  • DOI: 10.1063/1.3680104

Spin waves and the critical behaviour of the magnetization in
journal, July 1998


Strong anisotropy and magnetostriction in the two-dimensional Stoner ferromagnet Fe 3 GeTe 2
journal, April 2016


Competing antiferromagnetism in a quasi-2D itinerant ferromagnet: Fe 3 GeTe 2
journal, November 2016


Magnetism in two-dimensional van der Waals materials
journal, October 2018


Magnetic structure and phase stability of the van der Waals bonded ferromagnet Fe 3 x GeTe 2
journal, January 2016


Ferromagnetic Order, Strong Magnetocrystalline Anisotropy, and Magnetocaloric Effect in the Layered Telluride Fe 3−δ GeTe 2
journal, August 2015


Anomalous Hall effect in the van der Waals bonded ferromagnet Fe 3 x GeTe 2
journal, April 2018


Linear spin wave theory for single-Q incommensurate magnetic structures
journal, March 2015


Emergence of Kondo lattice behavior in a van der Waals itinerant ferromagnet, Fe 3 GeTe 2
journal, January 2018


Anisotropic anomalous Hall effect in triangular itinerant ferromagnet Fe 3 GeTe 2
journal, October 2017


Magnetic microstructure and magnetic properties of uniaxial itinerant ferromagnet Fe3GeTe2
journal, August 2016

  • León-Brito, N.; Bauer, E. D.; Ronning, F.
  • Journal of Applied Physics, Vol. 120, Issue 8
  • DOI: 10.1063/1.4961592

Quantized Anomalous Hall Effect in Magnetic Topological Insulators
journal, June 2010


Hard magnetic properties in nanoflake van der Waals Fe3GeTe2
journal, April 2018


Horace : Software for the analysis of data from single crystal spectroscopy experiments at time-of-flight neutron instruments
journal, October 2016

  • Ewings, R. A.; Buts, A.; Le, M. D.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 834
  • DOI: 10.1016/j.nima.2016.07.036

Antiferromagnetic correlations in the metallic strongly correlated transition metal oxide LaNiO3
journal, January 2018


Two-dimensional gas of massless Dirac fermions in graphene
journal, November 2005

  • Novoselov, K. S.; Geim, A. K.; Morozov, S. V.
  • Nature, Vol. 438, Issue 7065, p. 197-200
  • DOI: 10.1038/nature04233

Wafer-scale two-dimensional ferromagnetic Fe3GeTe2 thin films grown by molecular beam epitaxy
journal, September 2017