Nanoscale Skyrmions in a Nonchiral Metallic Multiferroic: Ni2MnGa
Abstract
Magnetic skyrmions belong to a set of topologically nontrivial spin textures at the nanoscale that have received increased attention due to their emergent behavior and novel potential spintronic applications. Discovering materials systems that can host skyrmions at room temperature in the absence of external magnetic field is of crucial importance not only from a fundamental aspect, but also from a technological point of view. So far, the observations of skyrmions in bulk metallic ferromagnets have been limited to low temperatures and to materials that exhibit strong chiral interactions. In this paper, we show the formation of nanoscale skyrmions in a nonchiral multiferroic material, which is ferromagnetic and ferroelastic, Ni2MnGa at room temperature without the presence of external magnetic fields. By using Lorentz transmission electron microscopy in combination with micromagnetic simulations, we elucidate their formation, behavior, and stability under applied magnetic fields at room temperature. Finally, the formation of skyrmions in a multiferroic material with no broken inversion symmetry presents new exciting opportunities for the exploration of the fundamental physics of topologically nontrivial spin textures.
- Authors:
-
- Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
- Carnegie Mellon Univ., Pittsburgh, PA (United States). Dept. of Materials Science and Engineering
- Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- Contributing Org.:
- Northwestern Univ., Evanston, IL (United States)
- OSTI Identifier:
- 1352682
- Grant/Contract Number:
- AC02-06CH11357; DMR-1306296
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nano Letters
- Additional Journal Information:
- Journal Volume: 16; Journal Issue: 7; Journal ID: ISSN 1530-6984
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Lorentz transmission electron microscopy; multiferroic material; Skyrmions
Citation Formats
Phatak, Charudatta, Heinonen, Olle, De Graef, Marc, and Petford-Long, Amanda. Nanoscale Skyrmions in a Nonchiral Metallic Multiferroic: Ni2MnGa. United States: N. p., 2016.
Web. doi:10.1021/acs.nanolett.6b01011.
Phatak, Charudatta, Heinonen, Olle, De Graef, Marc, & Petford-Long, Amanda. Nanoscale Skyrmions in a Nonchiral Metallic Multiferroic: Ni2MnGa. United States. https://doi.org/10.1021/acs.nanolett.6b01011
Phatak, Charudatta, Heinonen, Olle, De Graef, Marc, and Petford-Long, Amanda. Tue .
"Nanoscale Skyrmions in a Nonchiral Metallic Multiferroic: Ni2MnGa". United States. https://doi.org/10.1021/acs.nanolett.6b01011. https://www.osti.gov/servlets/purl/1352682.
@article{osti_1352682,
title = {Nanoscale Skyrmions in a Nonchiral Metallic Multiferroic: Ni2MnGa},
author = {Phatak, Charudatta and Heinonen, Olle and De Graef, Marc and Petford-Long, Amanda},
abstractNote = {Magnetic skyrmions belong to a set of topologically nontrivial spin textures at the nanoscale that have received increased attention due to their emergent behavior and novel potential spintronic applications. Discovering materials systems that can host skyrmions at room temperature in the absence of external magnetic field is of crucial importance not only from a fundamental aspect, but also from a technological point of view. So far, the observations of skyrmions in bulk metallic ferromagnets have been limited to low temperatures and to materials that exhibit strong chiral interactions. In this paper, we show the formation of nanoscale skyrmions in a nonchiral multiferroic material, which is ferromagnetic and ferroelastic, Ni2MnGa at room temperature without the presence of external magnetic fields. By using Lorentz transmission electron microscopy in combination with micromagnetic simulations, we elucidate their formation, behavior, and stability under applied magnetic fields at room temperature. Finally, the formation of skyrmions in a multiferroic material with no broken inversion symmetry presents new exciting opportunities for the exploration of the fundamental physics of topologically nontrivial spin textures.},
doi = {10.1021/acs.nanolett.6b01011},
journal = {Nano Letters},
number = 7,
volume = 16,
place = {United States},
year = {Tue May 17 00:00:00 EDT 2016},
month = {Tue May 17 00:00:00 EDT 2016}
}
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