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Title: Local and nonlocal isomer shifts in bcc Fe-{ital X} alloys ({ital X}=Al,Si,Ga,Ge)

Abstract

We measured Moessbauer spectra from bcc alloys of compositions near Fe{sub 3}Al, Fe{sub 3}Si, and Fe{sub 3}Ge, and reanalyzed older data from Fe{sub 3}Ga. All four alloys developed some {ital D}0{sub 3} chemical order, and their Moessbauer spectra were qualitatively similar. The local (first-nearest-neighbor) could be distinguished from the nonlocal (beyond the first-nearest-neighbor) contributions to the {sup 57}Fe isomer shifts from the solute atoms owing to differences in their hyperfine magnetic fields. The nonlocal isomer shift contributions correlated best to the valence of the solute atom, and not to the atomic volume. The local isomer shift contributions were best attributed to a loss of Fe 3{ital d} electrons at the solute sites.

Authors:
;  [1];  [2];  [3]
  1. California Institute of Technology, Pasadena, California 91125 (United States)
  2. Department of Physics, Wichita State University, Wichita, Kansas 67260 (United States)
  3. Center for Electromagnetics Research, Northeastern University, Boston, Massachusetts 02115 (United States)
Publication Date:
OSTI Identifier:
142599
DOE Contract Number:  
FG03-86ER45270
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 49; Journal Issue: 9; Other Information: PBD: 1 Mar 1994
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; IRON BASE ALLOYS; ISOMER SHIFT; ALUMINIUM ALLOYS; SILICON ALLOYS; GALLIUM ALLOYS; GERMANIUM ALLOYS; BINARY ALLOY SYSTEMS; BCC LATTICES; MOESSBAUER EFFECT

Citation Formats

Fultz, B., Gao, Z., Hamdeh, H.H., and Oliver, S.A.. Local and nonlocal isomer shifts in bcc Fe-{ital X} alloys ({ital X}=Al,Si,Ga,Ge). United States: N. p., 1994. Web. doi:10.1103/PhysRevB.49.6312.
Fultz, B., Gao, Z., Hamdeh, H.H., & Oliver, S.A.. Local and nonlocal isomer shifts in bcc Fe-{ital X} alloys ({ital X}=Al,Si,Ga,Ge). United States. doi:10.1103/PhysRevB.49.6312.
Fultz, B., Gao, Z., Hamdeh, H.H., and Oliver, S.A.. Tue . "Local and nonlocal isomer shifts in bcc Fe-{ital X} alloys ({ital X}=Al,Si,Ga,Ge)". United States. doi:10.1103/PhysRevB.49.6312.
@article{osti_142599,
title = {Local and nonlocal isomer shifts in bcc Fe-{ital X} alloys ({ital X}=Al,Si,Ga,Ge)},
author = {Fultz, B. and Gao, Z. and Hamdeh, H.H. and Oliver, S.A.},
abstractNote = {We measured Moessbauer spectra from bcc alloys of compositions near Fe{sub 3}Al, Fe{sub 3}Si, and Fe{sub 3}Ge, and reanalyzed older data from Fe{sub 3}Ga. All four alloys developed some {ital D}0{sub 3} chemical order, and their Moessbauer spectra were qualitatively similar. The local (first-nearest-neighbor) could be distinguished from the nonlocal (beyond the first-nearest-neighbor) contributions to the {sup 57}Fe isomer shifts from the solute atoms owing to differences in their hyperfine magnetic fields. The nonlocal isomer shift contributions correlated best to the valence of the solute atom, and not to the atomic volume. The local isomer shift contributions were best attributed to a loss of Fe 3{ital d} electrons at the solute sites.},
doi = {10.1103/PhysRevB.49.6312},
journal = {Physical Review, B: Condensed Matter},
number = 9,
volume = 49,
place = {United States},
year = {1994},
month = {3}
}