Tuning Noncollinear Spin Structure and Anisotropy in Ferromagnetic Nitride MXenes
Abstract
Recent experimental success in the realization of two-dimensional magnetism has invigorated the search for low-dimensional material systems with tunable magnetic anisotropy that exhibit intrinsic long-range ferromagnetic order. Here in this paper, we report that modifying the surface termination and transition metal in monolayer M2NTx nitride MXenes gives rise to a rich diversity of noncollinear spin structures and finely tunable magnetocrystalline anisotropy. Based on first-principles simulations, we predict that manipulating the strength of the spin–orbit interaction and electron localization via the chemical degrees of freedom can induce sufficient anisotropy to counteract thermal fluctuations that suppress long-range magnetic order. We find that Ti2NO2 and Mn2NF2 MXenes have continuous O(3) and O(2) spin symmetries, respectively, that may be broken by an applied field, while Cr2NO2 and Mn2NO2 are intrinsic Ising ferromagnets with out-of-plane easy axes and magnetic anisotropy energies up to 63 μeV/atom. These systems also exhibit both gapped and gapless Dirac points near the Fermi level. Our study suggests that nitride MXenes offer a promising avenue for achieving both practical spintronic devices and investigating fundamental spin processes in two-dimensional materials.
- Authors:
-
[1];
[1];
[2];
[2];
- Univ. of Pennsylvania, Philadelphia, PA (United States)
- Drexel Univ., Philadelphia, PA (United States). A. J. Drexel Nanotechnology Inst.
- Publication Date:
- Research Org.:
- Drexel Univ., Philadelphia, PA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); US Army Research Office (ARO); National Science Foundation (NSF); USDOD
- OSTI Identifier:
- 1774203
- Grant/Contract Number:
- SC0018618; W911NF-16-1-0447; EFMA-542879; CMMI-1363203 (
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Nano
- Additional Journal Information:
- Journal Volume: 12; Journal Issue: 6; Journal ID: ISSN 1936-0851
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 2D materials; MXenes; magnetic anisotropy; noncollinear magnetism; DFT; spintronics
Citation Formats
Frey, Nathan C., Kumar, Hemant, Anasori, Babak, Gogotsi, Yury, and Shenoy, Vivek B. Tuning Noncollinear Spin Structure and Anisotropy in Ferromagnetic Nitride MXenes. United States: N. p., 2018.
Web. doi:10.1021/acsnano.8b03472.
Frey, Nathan C., Kumar, Hemant, Anasori, Babak, Gogotsi, Yury, & Shenoy, Vivek B. Tuning Noncollinear Spin Structure and Anisotropy in Ferromagnetic Nitride MXenes. United States. https://doi.org/10.1021/acsnano.8b03472
Frey, Nathan C., Kumar, Hemant, Anasori, Babak, Gogotsi, Yury, and Shenoy, Vivek B. Fri .
"Tuning Noncollinear Spin Structure and Anisotropy in Ferromagnetic Nitride MXenes". United States. https://doi.org/10.1021/acsnano.8b03472. https://www.osti.gov/servlets/purl/1774203.
@article{osti_1774203,
title = {Tuning Noncollinear Spin Structure and Anisotropy in Ferromagnetic Nitride MXenes},
author = {Frey, Nathan C. and Kumar, Hemant and Anasori, Babak and Gogotsi, Yury and Shenoy, Vivek B.},
abstractNote = {Recent experimental success in the realization of two-dimensional magnetism has invigorated the search for low-dimensional material systems with tunable magnetic anisotropy that exhibit intrinsic long-range ferromagnetic order. Here in this paper, we report that modifying the surface termination and transition metal in monolayer M2NTx nitride MXenes gives rise to a rich diversity of noncollinear spin structures and finely tunable magnetocrystalline anisotropy. Based on first-principles simulations, we predict that manipulating the strength of the spin–orbit interaction and electron localization via the chemical degrees of freedom can induce sufficient anisotropy to counteract thermal fluctuations that suppress long-range magnetic order. We find that Ti2NO2 and Mn2NF2 MXenes have continuous O(3) and O(2) spin symmetries, respectively, that may be broken by an applied field, while Cr2NO2 and Mn2NO2 are intrinsic Ising ferromagnets with out-of-plane easy axes and magnetic anisotropy energies up to 63 μeV/atom. These systems also exhibit both gapped and gapless Dirac points near the Fermi level. Our study suggests that nitride MXenes offer a promising avenue for achieving both practical spintronic devices and investigating fundamental spin processes in two-dimensional materials.},
doi = {10.1021/acsnano.8b03472},
journal = {ACS Nano},
number = 6,
volume = 12,
place = {United States},
year = {Fri Jun 08 00:00:00 EDT 2018},
month = {Fri Jun 08 00:00:00 EDT 2018}
}
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