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Title: Ferromagnetism of Fe 3Sn and alloys

Abstract

Hexagonal Fe 3Sn has many of the desirable properties for a new permanent magnet phase with a Curie temperature of 725 K, a saturation moment of 1.18 MA/m. and anisotropy energy, K 1 of 1.8 MJ/m 3. However, contrary to earlier experimental reports, we found both experimentally and theoretically that the easy magnetic axis lies in the hexagonal plane, which is undesirable for a permanent magnet material. One possibility for changing the easy axis direction is through alloying. We used first principles calculations to investigate the effect of elemental substitutions. The calculations showed that substitution on the Sn site has the potential to switch the easy axis direction. Transition metal substitutions with Co or Mn do not have this effect. We attempted synthesis of a number of these alloys and found results in accord with the theoretical predictions for those that were formed. However, the alloys that could be readily made all showed an in-plane easy axis. The electronic structure of Fe 3Sn is reported, as are some are magnetic and structural properties for the Fe 3Sn 2, and Fe 5Sn 3 compounds, which could be prepared as mm-sized single crystals.

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1185566
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 4; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; condensed-matter physics; ferromagnetism; physics

Citation Formats

Sales, Brian C., Saparov, Bayrammurad, McGuire, Michael A., Singh, David J., and Parker, David S. Ferromagnetism of Fe3Sn and alloys. United States: N. p., 2014. Web. doi:10.1038/srep07024.
Sales, Brian C., Saparov, Bayrammurad, McGuire, Michael A., Singh, David J., & Parker, David S. Ferromagnetism of Fe3Sn and alloys. United States. doi:10.1038/srep07024.
Sales, Brian C., Saparov, Bayrammurad, McGuire, Michael A., Singh, David J., and Parker, David S. Wed . "Ferromagnetism of Fe3Sn and alloys". United States. doi:10.1038/srep07024. https://www.osti.gov/servlets/purl/1185566.
@article{osti_1185566,
title = {Ferromagnetism of Fe3Sn and alloys},
author = {Sales, Brian C. and Saparov, Bayrammurad and McGuire, Michael A. and Singh, David J. and Parker, David S.},
abstractNote = {Hexagonal Fe3Sn has many of the desirable properties for a new permanent magnet phase with a Curie temperature of 725 K, a saturation moment of 1.18 MA/m. and anisotropy energy, K1 of 1.8 MJ/m3. However, contrary to earlier experimental reports, we found both experimentally and theoretically that the easy magnetic axis lies in the hexagonal plane, which is undesirable for a permanent magnet material. One possibility for changing the easy axis direction is through alloying. We used first principles calculations to investigate the effect of elemental substitutions. The calculations showed that substitution on the Sn site has the potential to switch the easy axis direction. Transition metal substitutions with Co or Mn do not have this effect. We attempted synthesis of a number of these alloys and found results in accord with the theoretical predictions for those that were formed. However, the alloys that could be readily made all showed an in-plane easy axis. The electronic structure of Fe3Sn is reported, as are some are magnetic and structural properties for the Fe3Sn2, and Fe5Sn3 compounds, which could be prepared as mm-sized single crystals.},
doi = {10.1038/srep07024},
journal = {Scientific Reports},
number = ,
volume = 4,
place = {United States},
year = {2014},
month = {11}
}

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Cited by: 12 works
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Works referenced in this record:

Generalized Gradient Approximation Made Simple
journal, October 1996

  • Perdew, John P.; Burke, Kieron; Ernzerhof, Matthias
  • Physical Review Letters, Vol. 77, Issue 18, p. 3865-3868
  • DOI: 10.1103/PhysRevLett.77.3865