Effects of composition, temperature, and magnetism on phonons in bcc Fe-V alloys
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
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Additional details
- Eprint ID
- 20738
- Resolver ID
- CaltechAUTHORS:20101110-092304852
- DE-FG02-03ER46055
- Department of Energy (DOE)
- W-31-109-ENG-38
- Department of Energy (DOE)
- National Nuclear Security Administration
- DE-AC02-06CH11357
- Department of Energy (DOE)
- DMR-0520547
- NSF
- Created
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2010-11-18Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field