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
Publication typeJournal Article
Publication date2019-09-01
Quartile SCImago
Q2
Quartile WOS
Q3
Impact factor2.7
ISSN03048853
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.

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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.
GOST all authors (up to 50) Copy
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.
RIS |
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RIS Copy
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 -
BibTex
Cite this
BibTex Copy
@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}
}
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