Stable room-temperature ferromagnetic phase at the FeRh(100) surface
Abstract
Interfaces and low dimensionality are sources of strong modifications of electronic, structural, and magnetic properties of materials. FeRh alloys are an excellent example because of the first-order phase transition taking place at ~400 K from an antiferromagnetic phase at room temperature to a high temperature ferromagnetic one. It is accompanied by a resistance change and volume expansion of about 1%. We have investigated the electronic and magnetic properties of FeRh(100) epitaxially grown on MgO by combining spectroscopies characterized by different probing depths, namely X-ray magnetic circular dichroism and photoelectron spectroscopy. Furthermore, we find that the symmetry breaking induced at the Rh-terminated surface stabilizes a surface ferromagnetic layer involving five planes of Fe and Rh atoms in the nominally antiferromagnetic phase at room temperature. First-principles calculations provide a microscopic description of the structural relaxation and the electron spin-density distribution that support the experimental findings.
- Authors:
-
- Synchrotron-SOLEIL, Gif sur Yvette Cedex (France)
- Univ. of California, San Diego, CA (United States)
- Ecole Polytechnique, CNRS, CEA-DSM-IRAMIS, Univ. Paris-Saclay, Palaiseau (France)
- Univ. of California, San Diego, La Jolla, CA (United States)
- Publication Date:
- Research Org.:
- Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1252726
- Grant/Contract Number:
- SC0003678
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 6; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; electronic structure; information storage; magnetic properties and materials
Citation Formats
Pressacco, Federico, Uhlir, Vojtech, Gatti, Matteo, Bendounan, Azzedine, Fullerton, Eric E., and Sirotti, Fausto. Stable room-temperature ferromagnetic phase at the FeRh(100) surface. United States: N. p., 2016.
Web. doi:10.1038/srep22383.
Pressacco, Federico, Uhlir, Vojtech, Gatti, Matteo, Bendounan, Azzedine, Fullerton, Eric E., & Sirotti, Fausto. Stable room-temperature ferromagnetic phase at the FeRh(100) surface. United States. https://doi.org/10.1038/srep22383
Pressacco, Federico, Uhlir, Vojtech, Gatti, Matteo, Bendounan, Azzedine, Fullerton, Eric E., and Sirotti, Fausto. Thu .
"Stable room-temperature ferromagnetic phase at the FeRh(100) surface". United States. https://doi.org/10.1038/srep22383. https://www.osti.gov/servlets/purl/1252726.
@article{osti_1252726,
title = {Stable room-temperature ferromagnetic phase at the FeRh(100) surface},
author = {Pressacco, Federico and Uhlir, Vojtech and Gatti, Matteo and Bendounan, Azzedine and Fullerton, Eric E. and Sirotti, Fausto},
abstractNote = {Interfaces and low dimensionality are sources of strong modifications of electronic, structural, and magnetic properties of materials. FeRh alloys are an excellent example because of the first-order phase transition taking place at ~400 K from an antiferromagnetic phase at room temperature to a high temperature ferromagnetic one. It is accompanied by a resistance change and volume expansion of about 1%. We have investigated the electronic and magnetic properties of FeRh(100) epitaxially grown on MgO by combining spectroscopies characterized by different probing depths, namely X-ray magnetic circular dichroism and photoelectron spectroscopy. Furthermore, we find that the symmetry breaking induced at the Rh-terminated surface stabilizes a surface ferromagnetic layer involving five planes of Fe and Rh atoms in the nominally antiferromagnetic phase at room temperature. First-principles calculations provide a microscopic description of the structural relaxation and the electron spin-density distribution that support the experimental findings.},
doi = {10.1038/srep22383},
journal = {Scientific Reports},
number = ,
volume = 6,
place = {United States},
year = {Thu Mar 03 00:00:00 EST 2016},
month = {Thu Mar 03 00:00:00 EST 2016}
}
Web of Science
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