Magnetoresistance of CoFeNi/Cu Superlattices Differing in the Ferromagnetic Alloy Composition
- Authors: Milyaev M.A.1,2, Bannikova N.S.1, Naumova L.I.1,2, Proglyado V.V.1, Patrakov E.I.1, Kamenskii I.Y.1, Ustinov V.V.1,2
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Affiliations:
- Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
- Ural Federal University Named after the First President of Russia B.N. Yeltsin, Institute of Natural Sciences and Mathematics
- Issue: Vol 120, No 9 (2019)
- Pages: 831-837
- Section: Electrical and Magnetic Properties
- URL: https://journals.rcsi.science/0031-918X/article/view/168677
- DOI: https://doi.org/10.1134/S0031918X19090084
- ID: 168677
Cite item
Abstract
Abstract—The structure and magnetoresistive properties of Ta(5 nm)/NiFeCr(5 nm)/[FM(tFM)/Cu(2.2 nm)]n/ Ta(5 nm) superlattices prepared by magnetron sputtering are studied in this work. The ferromagnetic layer thickness tFM is varied in a 1.1–1.5 nm range. The Co90Fe10, Co85Fe12Ni3, Co77Fe17Ni6, and Co70Fe20Ni10 alloys with an fcc structure and close saturation magnetization values are used as the ferromagnetic (FM) materials. It is shown that, as the Ni and Fe contents in the CoFeNi alloy increase, the magnetoresistance of superlattices containing eight bilayers remains high and equal to 24–28%; in this case, the twofold decrease in the hysteresis occurs. As the number of bilayers in the superlattices, which contain CoFeNi alloys differing in composition increases to 12, the close values of magnetoresistance 30–31% are obtained. The correlation between the saturation magnetization of the ferromagnetic material of superlattice layers and maximum value of magnetoresistance is discussed.
About the authors
M. A. Milyaev
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Ural Federal University Named after the First President of Russia B.N. Yeltsin, Institute of Natural Sciences and Mathematics
Author for correspondence.
Email: milyaev@imp.uran.ru
Russian Federation, Ekaterinburg, 620990; Ekaterinburg, 620002
N. S. Bannikova
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: milyaev@imp.uran.ru
Russian Federation, Ekaterinburg, 620990
L. I. Naumova
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Ural Federal University Named after the First President of Russia B.N. Yeltsin, Institute of Natural Sciences and Mathematics
Email: milyaev@imp.uran.ru
Russian Federation, Ekaterinburg, 620990; Ekaterinburg, 620002
V. V. Proglyado
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: milyaev@imp.uran.ru
Russian Federation, Ekaterinburg, 620990
E. I. Patrakov
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: milyaev@imp.uran.ru
Russian Federation, Ekaterinburg, 620990
I. Yu. Kamenskii
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: milyaev@imp.uran.ru
Russian Federation, Ekaterinburg, 620990
V. V. Ustinov
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Ural Federal University Named after the First President of Russia B.N. Yeltsin, Institute of Natural Sciences and Mathematics
Email: milyaev@imp.uran.ru
Russian Federation, Ekaterinburg, 620990; Ekaterinburg, 620002