skip to main content

SciTech ConnectSciTech Connect

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

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.
Authors:
;  [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)
Publication Date:
OSTI Identifier:
22273867
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal 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)
Country of Publication:
United States
Language:
English
Subject:
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