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Title: Phonon-magnon interactions in body centered cubic iron: A combined molecular and spin dynamics study

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.4863488· OSTI ID:22273867
;  [1]; ; ; ;  [2];  [3]
  1. Center for Simulational Physics, The University of Georgia, Georgia 30602 (United States)
  2. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
  3. Florida State University, Tallahassee, Florida 32306 (United States)
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Combining an atomistic many-body potential with a classical spin Hamiltonian parameterized by first principles calculations, molecular-spin dynamics computer simulations were performed to investigate phonon-magnon interactions in body centered cubic iron. Results obtained for spin-spin and density-density dynamic structure factors show that noticeable softening and damping of magnon modes occur due to the presence of lattice vibrations. Furthermore, as a result of the phonon-magnon coupling, additional longitudinal spin wave excitations are observed, with the same frequencies as the longitudinal phonon modes.

OSTI ID:
22273867
Journal Information:
Journal of Applied Physics, Vol. 115, Issue 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
Country of Publication:
United States
Language:
English

References (12)

Effect of optical phonon-magnon interaction on the magnon softening at finite temperature journal November 2011
Million-atom molecular dynamics simulations of magnetic iron journal February 2007
Equation of State Calculations by Fast Computing Machines journal June 1953
Spin dynamics simulations of classical ferro- and antiferromagnetic model systems: comparison with theory and experiment journal January 1999
A `magnetic' interatomic potential for molecular dynamics simulations. journal May 2007
Molecular and spin dynamics simulations using modern integration methods journal July 2005
Algorithm for Molecular Dynamics Simulations of Spin Liquids text January 2001
Million-Atom Molecular Dynamics Simulations of Magnetic Iron journal November 2007
A ‘magnetic’ interatomic potential for molecular dynamics simulations journal October 2005
Algorithm for molecular dynamics simulations of spin liquids text January 2000
Fast spin dynamics algorithms for classical spin systems text January 1998
Longitudinal magnetic excitations in classical spin systems text January 1999

Cited By (3)

Dynamic simulation of structural phase transitions in magnetic iron journal September 2017
Reinventing atomistic magnetic simulations with spin-orbit coupling text January 2016
Collective dynamics in atomistic models with coupled translational and spin degrees of freedom text January 2017

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BCC LATTICES
COMPUTERIZED SIMULATION
COUPLING
DAMPING
EXCITATION
HAMILTONIANS
IRON
LATTICE VIBRATIONS
MAGNONS
MANY-BODY PROBLEM
PHONONS
POTENTIALS
SPIN
SPIN WAVES
STRUCTURE FACTORS