Ferromagnetism of Fe3Sn and alloys
Abstract
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.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (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. https://doi.org/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. https://doi.org/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 = {Wed Nov 12 00:00:00 EST 2014},
month = {Wed Nov 12 00:00:00 EST 2014}
}
Web of Science
Figures / Tables:
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