CaltechAUTHORS
Published October 22, 2010 | Version Published
Journal Article Open

Effects of composition, temperature, and magnetism on phonons in bcc Fe-V alloys

Creators

  • 1. ROR icon Oak Ridge National Laboratory
  • 2. ROR icon United States Air Force Research Laboratory
  • 3. ROR icon California Institute of Technology
  • 4. ROR icon Carnegie Institution for Science

Abstract

The phonon densities of states of body-centered-cubic Fe-V alloys across the full composition range were studied by inelastic neutron scattering, nuclear resonant inelastic x-ray scattering, and ab initio calculations. The average phonon energy followed the inverse of the electronic heat capacity and the inverse of the electronic density of states at the Fermi level, showing how the interatomic forces depend on electronic screening. These quantities, including phonon energy, changed rapidly near the composition of the paramagnetic-ferromagnetic transition. For Fe- and V-rich alloys, the thermal phonon softening deviated from quasiharmonic behavior but better agreement was found for intermediate compositions. The Fe partial phonon density of states has a distinctly different shape than V for alloys with less than 50 at. % Fe.

Additional Information

© 2010 The American Physical Society. Received 20 August 2010; published 22 October 2010. The portions of this work conducted at Oak Ridge National Laboratory were supported by the Scientific User Facilities Division and by the Division of Materials Sciences and Engineering, Office of Basic Energy Sciences, DOE. This work was supported by the Department of Energy through the Basic Energy Sciences under Grant No. DEFG02- 03ER46055 and BES-MS under Grant No. W-31-109- ENG-38. Portions of this work were performed at HPCAT (Sector 16), Advanced Photon Source (APS), Argonne National Laboratory. HPCAT is supported by CIW, CDAC, UNLV, and LLNL through funding from DOE-NNSA, DOEBES, and NSF. Use of the APS was supported by DOE-BES under Contract No. DE-AC02-06CH11357. This work benefited from DANSE software developed under NSF under Grant No. DMR-0520547.

Attached Files

Published - Lucas2010p11756Phys_Rev_B.pdf

Files

Lucas2010p11756Phys_Rev_B.pdf

Files (389.7 kB)

Name Size
md5:97695a38fc1cecbba6ba4d507ab2570b
389.7 kB Preview Download

Additional details

Identifiers

Eprint ID
20738
Resolver ID
CaltechAUTHORS:20101110-092304852

Funding

Department of Energy (DOE)
DE-FG02-03ER46055
Department of Energy (DOE)
W-31-109-ENG-38
National Nuclear Security Administration
Department of Energy (DOE)
DE-AC02-06CH11357
NSF
DMR-0520547

Dates

Created
2010-11-18
Created from EPrint's datestamp field
Updated
2021-11-09
Created from EPrint's last_modified field