Vertically Aligned Single-Crystalline CoFe2O4 Nanobrush Architectures with High Magnetization and Tailored Magnetic Anisotropy
Abstract
Micrometer-tall vertically aligned single-crystalline CoFe2O4 nanobrush architectures with extraordinarily large aspect ratio have been achieved by the precise control of a kinetic and thermodynamic non-equilibrium pulsed laser epitaxy process. Direct observations by scanning transmission electron microscopy reveal that the nanobrush crystal is mostly defect-free by nature, and epitaxially connected to the substrate through a continuous 2D interface layer. In contrast, periodic dislocations and lattice defects such as anti-phase boundaries and twin boundaries are frequently observed in the 2D interface layer, suggesting that interface misfit strain relaxation under a non-equilibrium growth condition plays a critical role in the self-assembly of such artificial architectures. Further, magnetic property measurements have found that the nanobrushes exhibit a saturation magnetization value of 6.16 μB/f.u., which is much higher than the bulk value. The discovery not only enables insights into an effective route for fabricating unconventional high-quality nanostructures, but also demonstrates a novel magnetic architecture with potential applications in nanomagnetic devices.
- Authors:
-
[2];
[2];
[2];
[2];
[2];
[2];
[2];
[2]
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Zhejiang Univ. of Technology, Hangzhou (China)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1615211
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nanomaterials
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 3; Journal ID: ISSN 2079-4991
- Publisher:
- MDPI
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; cobalt ferrite; nanobrush; pulsed laser epitaxy; vertically aligned; single crystalline; magnetization; tailored anisotropy
Citation Formats
Fan, Lisha, Gao, Xiang, Farmer, Thomas O., Lee, Dongkyu, Guo, Er-Jia, Mu, Sai, Wang, Kai, Fitzsimmons, Michael R., Chisholm, Matthew F., Ward, Thomas Zac, Eres, Gyula, and Lee, Ho Nyung. Vertically Aligned Single-Crystalline CoFe2O4 Nanobrush Architectures with High Magnetization and Tailored Magnetic Anisotropy. United States: N. p., 2020.
Web. doi:10.3390/nano10030472.
Fan, Lisha, Gao, Xiang, Farmer, Thomas O., Lee, Dongkyu, Guo, Er-Jia, Mu, Sai, Wang, Kai, Fitzsimmons, Michael R., Chisholm, Matthew F., Ward, Thomas Zac, Eres, Gyula, & Lee, Ho Nyung. Vertically Aligned Single-Crystalline CoFe2O4 Nanobrush Architectures with High Magnetization and Tailored Magnetic Anisotropy. United States. https://doi.org/10.3390/nano10030472
Fan, Lisha, Gao, Xiang, Farmer, Thomas O., Lee, Dongkyu, Guo, Er-Jia, Mu, Sai, Wang, Kai, Fitzsimmons, Michael R., Chisholm, Matthew F., Ward, Thomas Zac, Eres, Gyula, and Lee, Ho Nyung. Thu .
"Vertically Aligned Single-Crystalline CoFe2O4 Nanobrush Architectures with High Magnetization and Tailored Magnetic Anisotropy". United States. https://doi.org/10.3390/nano10030472. https://www.osti.gov/servlets/purl/1615211.
@article{osti_1615211,
title = {Vertically Aligned Single-Crystalline CoFe2O4 Nanobrush Architectures with High Magnetization and Tailored Magnetic Anisotropy},
author = {Fan, Lisha and Gao, Xiang and Farmer, Thomas O. and Lee, Dongkyu and Guo, Er-Jia and Mu, Sai and Wang, Kai and Fitzsimmons, Michael R. and Chisholm, Matthew F. and Ward, Thomas Zac and Eres, Gyula and Lee, Ho Nyung},
abstractNote = {Micrometer-tall vertically aligned single-crystalline CoFe2O4 nanobrush architectures with extraordinarily large aspect ratio have been achieved by the precise control of a kinetic and thermodynamic non-equilibrium pulsed laser epitaxy process. Direct observations by scanning transmission electron microscopy reveal that the nanobrush crystal is mostly defect-free by nature, and epitaxially connected to the substrate through a continuous 2D interface layer. In contrast, periodic dislocations and lattice defects such as anti-phase boundaries and twin boundaries are frequently observed in the 2D interface layer, suggesting that interface misfit strain relaxation under a non-equilibrium growth condition plays a critical role in the self-assembly of such artificial architectures. Further, magnetic property measurements have found that the nanobrushes exhibit a saturation magnetization value of 6.16 μB/f.u., which is much higher than the bulk value. The discovery not only enables insights into an effective route for fabricating unconventional high-quality nanostructures, but also demonstrates a novel magnetic architecture with potential applications in nanomagnetic devices.},
doi = {10.3390/nano10030472},
journal = {Nanomaterials},
number = 3,
volume = 10,
place = {United States},
year = {Thu Mar 05 00:00:00 EST 2020},
month = {Thu Mar 05 00:00:00 EST 2020}
}
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