Thin Metal Films with Dispersion-Hardening Magnetic Layers of Fe–Cr–Co Alloy

  • Vyacheslav S. Zayonchkovskiy Kaluga branch of Bauman Moscow State Technical University, 2, Baghenova str., 248000 Kaluga, Russian Federation https://orcid.org/0000-0002-6519-6003
  • Aung Kyaw Kyaw Kaluga branch of Bauman Moscow State Technical University, 2, Baghenova str., 248000 Kaluga, Russian Federation https://orcid.org/0000-0001-8427-3046
  • Igor M. Milyaev Baikov Institute of Metallurgy and Material Science of the Russian Academy of Sciences, 49, Leninsky pr., 119334 Moscow, Russian Federation
  • Nikolay S. Perov Faculty of Physics, Lomonosov Moscow State University, 1, Leninskiye Gory, GSP-1, 119991 Moscow, Russian Federation https://orcid.org/0000-0002-0757-4942
  • Igor A. Prokhorov Shubnikov Institute of Crystallography, Federal Scientifi c Research Centre “Crystallography and Photonics of the Russian Academy of Sciences, 49, Leninsky pr., 119333 Moscow, Russian Federation
  • Alexey A. Klimov Kotelnikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences, 11-7, Mokhovaya str., 125009 Moscow, Russian Federation
  • Alexey A. Andreev Kotelnikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences, 11-7, Mokhovaya str., 125009 Moscow, Russian Federation; National Research University “Moscow Power Engineering Institute 14, Krasnokazarmennaya str., 111250 Moscow, Russian Federation https://orcid.org/0000-0002-7537-1629
Keywords: magnetron sputtering, thin fi lms, coercive force, vacuum annealing.

Abstract

Purpose. The study of the magnetic properties and surface state of permanent magnet fi lms,
not containing precious metals, on a silicon substrate with a magnetization vector in the plane
of the fi lm.
Methods and methodology. Permanent magnet fi lms are created by magnetron sputtering and
subsequent single-stage high-vacuum rapid annealing. The structure of these magnets contains
three layers: an adhesive layer of vanadium, a compensation layer of copper, and a ferromagnetic
layer of a dispersion-hardening alloy (LDHA) of the Fe-Cr-Co system. The properties of the fi lms
were studied using confocal microscopy, X-ray diffractometry. A magnetic hysteresis loop was
built using a vibromagnitometer and an assembly for the study of the magneto-optic Kerr effect.
The morphology of the surface was studied using an atomic force microscope and a scanning
electron microscope.
Results. After annealing, a signifi cant bending of the substrates occurred, and with an insuffi cient
thickness of the compensation layer, the destruction of both the fi lm and part of the silicon
substrate was observed. It was found that the increase in the coercive force of the fi lms correlated
with a high level of mechanical stresses in LDHA, characteristic for the decomposition of a
supersaturated solid solution of chromium in iron in bulk materials.
For the preservation of the permanent magnet fi lm, the thickness of the copper compensation
layer must be not less than that of LDHA.
Conclusions. For the fi rst time, a permanent magnet fi lm was obtained, based on a layer of
dispersion-hardening composition, not containing precious metals, with a level of coercive force
suffi cient for use in magnetoresistive integrated magnetic fi eld sensors.

 

 

 

 

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Author Biographies

Vyacheslav S. Zayonchkovskiy, Kaluga branch of Bauman Moscow State Technical University, 2, Baghenova str., 248000 Kaluga, Russian Federation

Cand. Sci. (Phys.- Math.), Associate Professor of the Department of
“Materials Science and Chemistry” of the Kaluga branch of Bauman Moscow State Technical University,
Kaluga, Russian Federation; e-mail: zajonc4340@gmail.com.

Aung Kyaw Kyaw, Kaluga branch of Bauman Moscow State Technical University, 2, Baghenova str., 248000 Kaluga, Russian Federation

graduate student of the Kaluga branch of Bauman Moscow State Technical University,
Kaluga, Russian Federation

Igor M. Milyaev, Baikov Institute of Metallurgy and Material Science of the Russian Academy of Sciences, 49, Leninsky pr., 119334 Moscow, Russian Federation

Dr. Sci. (Phys.-Math.), Leading Researcher, Baikov Institute of Metallurgy and Material
Science of the Russian Academy of Sciences, Moscow, Russian Federation

Nikolay S. Perov, Faculty of Physics, Lomonosov Moscow State University, 1, Leninskiye Gory, GSP-1, 119991 Moscow, Russian Federation

Dr. Sci. (Phys.-Math.), Professor, Head of the Department of Magnetism, Lomonosov
Moscow State University, Russian Federation

Igor A. Prokhorov, Shubnikov Institute of Crystallography, Federal Scientifi c Research Centre “Crystallography and Photonics of the Russian Academy of Sciences, 49, Leninsky pr., 119333 Moscow, Russian Federation

Cand. Sci. (Phys.-Math.), Senior Researcher, Shubnikov Institute of Crystallography,
Federal Scientifi c Research Centre “Crystallography and Photonics of the Russian Academy of
Sciences, Moscow, Russian Federation

Alexey A. Klimov, Kotelnikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences, 11-7, Mokhovaya str., 125009 Moscow, Russian Federation

Cand. Sci. (Phys.-Math.), Senior Researcher, Kotelnikov Institute of Radio Engineering
and Electronics of the Russian Academy of Sciences, Moscow, Russian Federation

Alexey A. Andreev, Kotelnikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences, 11-7, Mokhovaya str., 125009 Moscow, Russian Federation; National Research University “Moscow Power Engineering Institute 14, Krasnokazarmennaya str., 111250 Moscow, Russian Federation

master, National Research University “Moscow Power Engineering Institute”,
Moscow, Russian Federation; Engineer, Kotelnikov Institute of Radio Engineering and Electronics of
the Russian Academy of Sciences, Moscow, Russian Federation


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Published
2019-12-19
How to Cite
Zayonchkovskiy, V., Kyaw, A. K., Milyaev, I., Perov, N., Prokhorov, I., Klimov, A., & Andreev, A. (2019). Thin Metal Films with Dispersion-Hardening Magnetic Layers of Fe–Cr–Co Alloy. Kondensirovannye Sredy I Mezhfaznye Granitsy = Condensed Matter and Interphases, 21(4), 505-518. https://doi.org/https://doi.org/10.17308/kcmf.2019.21/2362
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