Journal of Magnetism and Magnetic Materials, volume 485, pages 374-380
Unidirectional and uniaxial anisotropies in the MnN/CoFeB exchange bias system
Anish Rai
1
,
M. Dunz
2
,
Arjun Sapkota
1
,
Philipp Zilske
2
,
Jamileh Beik Mohammadi
3
,
Markus Meinert
2
,
Claudia Mewes
1
,
T Mewes
1
1
Department of Physics and Astronomy, The University of Alabama, Tuscaloosa, AL, United States
|
Publication type: Journal Article
Publication date: 2019-09-01
Quartile SCImago
Q2
Quartile WOS
Q3
Impact factor: 2.7
ISSN: 03048853
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Abstract
We report on broadband and in-plane angle dependent ferromagnetic resonance measurements of MnN (30 nm)/CoFeB ( t CoFeB ) exchange bias bilayer systems with CoFeB thicknesses ranging from 5 to 20 nm. We find that the strong unidirectional anisotropy in this system is accompanied by a strong uniaxial in-plane anisotropy and a small interfacial perpendicular anisotropy ( K ⊥ , i = 0.043 ± 0.001 erg / cm 2 ). The strength of the interfacial exchange bias coupling in this system Δ σ eb = 0.193 ± 0.005 erg / cm 2 is only 2.5 times larger than the interfacial uniaxial coupling strength Δ σ u = 0.076 ± 0.003 erg / cm 2 . The relaxation in this system also shows a strong unidirectional and uniaxial in-plane anisotropy. While the observed thickness dependence of the uniaxial anisotropy of the relaxation is consistent with an interfacial two-magnon scattering contribution, we find that this is not the case for the unidirectional relaxation.
Top-30
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Journal of Magnetism and Magnetic Materials
4 publications, 50%
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1 publication, 12.5%
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1 publication, 12.5%
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Citations by publishers
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Elsevier
4 publications, 50%
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1 publication, 12.5%
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American Physical Society (APS)
1 publication, 12.5%
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Multidisciplinary Digital Publishing Institute (MDPI)
1 publication, 12.5%
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Rai A. et al. Unidirectional and uniaxial anisotropies in the MnN/CoFeB exchange bias system // Journal of Magnetism and Magnetic Materials. 2019. Vol. 485. pp. 374-380.
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Rai A., Dunz M., Sapkota A., Zilske P., Mohammadi J. B., Meinert M., Mewes C., Mewes T. Unidirectional and uniaxial anisotropies in the MnN/CoFeB exchange bias system // Journal of Magnetism and Magnetic Materials. 2019. Vol. 485. pp. 374-380.
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TY - JOUR
DO - 10.1016/j.jmmm.2019.04.043
UR - https://doi.org/10.1016/j.jmmm.2019.04.043
TI - Unidirectional and uniaxial anisotropies in the MnN/CoFeB exchange bias system
T2 - Journal of Magnetism and Magnetic Materials
AU - Rai, Anish
AU - Dunz, M.
AU - Sapkota, Arjun
AU - Zilske, Philipp
AU - Mohammadi, Jamileh Beik
AU - Meinert, Markus
AU - Mewes, Claudia
AU - Mewes, T
PY - 2019
DA - 2019/09/01 00:00:00
PB - Elsevier
SP - 374-380
VL - 485
SN - 0304-8853
ER -
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@article{2019_Rai,
author = {Anish Rai and M. Dunz and Arjun Sapkota and Philipp Zilske and Jamileh Beik Mohammadi and Markus Meinert and Claudia Mewes and T Mewes},
title = {Unidirectional and uniaxial anisotropies in the MnN/CoFeB exchange bias system},
journal = {Journal of Magnetism and Magnetic Materials},
year = {2019},
volume = {485},
publisher = {Elsevier},
month = {sep},
url = {https://doi.org/10.1016/j.jmmm.2019.04.043},
pages = {374--380},
doi = {10.1016/j.jmmm.2019.04.043}
}