High-coercivity magnetism in nanostructures with strong easy-plane anisotropy
Abstract
Here, we report the fabrication of a rare-earth-free permanent-magnet material Co3Si in the form of nanoparticles and investigate its magnetic properties by experiments and density-functional theory (DFT). The DFT calculations show that bulk Co3Si has an easy-plane anisotropy with a high K1 ≈ -64 Merg/cm3 (-6.4 MJ/m3) and magnetic polarization of 9.2 kG (0.92 T). In spite of having a negative anisotropy that generally leads to negligibly low coercivities in bulk crystals, Co3Si nanoparticles exhibit high coercivities (17.4 kOe at 10K and 4.3 kOe at 300 K). This result is a consequence of the unique nanostructure made possible by an effective easy-axis alignment in the cluster-deposition method and explained using micromagnetic analysis as a nanoscale phenomenon involving quantum-mechanical exchange interactions.
- Authors:
-
[1];
- Univ. of Nebraska, Lincoln, NE (United States). Nebraska Center for Materials and Nanoscience and Dept. of Physics and Astronomy
- Univ. of Nebraska, Lincoln, NE (United States). Nebraska Center for Materials and Nanoscience
- Univ. of Delaware, Newark, DE (United States). Dept. of Physics and Astronomy
- Publication Date:
- Research Org.:
- Univ. of Nebraska, Lincoln, NE (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); US Army Research Office (ARO); National Science Foundation (NSF)
- OSTI Identifier:
- 1470753
- Alternate Identifier(s):
- OSTI ID: 1247890
- Grant/Contract Number:
- FG02-04ER46152; FG02-04ER4612; WF911NF-10-2-0099; NNCI: 1542182
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 108; Journal Issue: 15; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE
Citation Formats
Balasubramanian, Balamurugan, Manchanda, Priyanka, Skomski, Ralph, Mukherjee, Pinaki, Valloppilly, Shah R., Das, Bhaskar, Hadjipanayis, George C., and Sellmyer, David J. High-coercivity magnetism in nanostructures with strong easy-plane anisotropy. United States: N. p., 2016.
Web. doi:10.1063/1.4945987.
Balasubramanian, Balamurugan, Manchanda, Priyanka, Skomski, Ralph, Mukherjee, Pinaki, Valloppilly, Shah R., Das, Bhaskar, Hadjipanayis, George C., & Sellmyer, David J. High-coercivity magnetism in nanostructures with strong easy-plane anisotropy. United States. https://doi.org/10.1063/1.4945987
Balasubramanian, Balamurugan, Manchanda, Priyanka, Skomski, Ralph, Mukherjee, Pinaki, Valloppilly, Shah R., Das, Bhaskar, Hadjipanayis, George C., and Sellmyer, David J. Fri .
"High-coercivity magnetism in nanostructures with strong easy-plane anisotropy". United States. https://doi.org/10.1063/1.4945987. https://www.osti.gov/servlets/purl/1470753.
@article{osti_1470753,
title = {High-coercivity magnetism in nanostructures with strong easy-plane anisotropy},
author = {Balasubramanian, Balamurugan and Manchanda, Priyanka and Skomski, Ralph and Mukherjee, Pinaki and Valloppilly, Shah R. and Das, Bhaskar and Hadjipanayis, George C. and Sellmyer, David J.},
abstractNote = {Here, we report the fabrication of a rare-earth-free permanent-magnet material Co3Si in the form of nanoparticles and investigate its magnetic properties by experiments and density-functional theory (DFT). The DFT calculations show that bulk Co3Si has an easy-plane anisotropy with a high K1 ≈ -64 Merg/cm3 (-6.4 MJ/m3) and magnetic polarization of 9.2 kG (0.92 T). In spite of having a negative anisotropy that generally leads to negligibly low coercivities in bulk crystals, Co3Si nanoparticles exhibit high coercivities (17.4 kOe at 10K and 4.3 kOe at 300 K). This result is a consequence of the unique nanostructure made possible by an effective easy-axis alignment in the cluster-deposition method and explained using micromagnetic analysis as a nanoscale phenomenon involving quantum-mechanical exchange interactions.},
doi = {10.1063/1.4945987},
journal = {Applied Physics Letters},
number = 15,
volume = 108,
place = {United States},
year = {Fri Apr 15 00:00:00 EDT 2016},
month = {Fri Apr 15 00:00:00 EDT 2016}
}
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