Vladimir Tsepelev

Prof. Dr. Vladimir Tsepelev

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Research Focus & Metrics

Academic Career Length

12Years (2015-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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5 January 2021 in Nanomaterials
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Journal Article
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Vladimir TsepelevVladimir Tsepelev
Vladimir Tsepelev
YSYuri Starodubtsev
Yuri Starodubtsev
The review is devoted to the analysis of physical processes occurring at different stages of production and application of nanocrystalline soft magnetic materials based on Fe–Si–B doped with various chemical elements. The temperature dependences of the kinematic viscosity showed that above a critical temperature, the viscosity of multicomponent melts at the cooling stage does not coincide with the viscosity at the heating stage. Above the critical temperature, the structure of the melt is more homogeneous, the amorphous precursor from such a melt has greater plasticity and enthalpy of crystallization and, after nanocrystallization, the material has a higher permeability. The most effective inhibitor elements are insoluble in α-Fe and form a smoothed peak of heat release during crystallization. On the other hand, the finest nanograins and the highest permeability are achieved at a narrow high-temperature peak of heat release. The cluster magnetic structure of a nanocrystalline material is the cause of magnetic inhomogeneity, which affects the shape of the magnetic hysteresis loop and core losses.

1 June 2019 in Journal of Magnetism and Magnetic Materials
Verified
Journal Article
Closed access
YSYu.N. Starodubtsev
Yu.N. Starodubtsev
VKV.A. Kataev
V.A. Kataev
KBK.O. Bessonova
K.O. Bessonova
Vladimir TsepelevVladimir Tsepelev
Vladimir Tsepelev

20 April 2021 in Metallurgical and Materials Transactions B
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Journal Article
Closed access
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YSYuri Starodubtsev
Yuri Starodubtsev
Vladimir TsepelevVladimir Tsepelev
Vladimir Tsepelev

1 June 2017 in Journal of Alloys and Compounds
Verified
Journal Article
Closed access
Vladimir TsepelevVladimir Tsepelev
Vladimir Tsepelev
YSYu. Starodubtsev
Yu. Starodubtsev
VKV. Konashkov
V. Konashkov
VBV. Belozerov
V. Belozerov

17 October 2017 in AIP Advances
Verified
Journal Article
Open access
Vladimir TsepelevVladimir Tsepelev
Vladimir Tsepelev
YSYu. N. Starodubtsev
Yu. N. Starodubtsev
NTN. P. Tsepeleva
N. P. Tsepeleva
The scaling law of minor loops was studied on an amorphous alloy Co66Fe3Cr3Si15B13 with a very high initial permeability (more than 150000) and low coercivity (about 0.1 A/m). An analytical expression for the coercive force in the Rayleigh region was derived. The coercive force is connected with the maximal magnetic field Hmax via the reversibility coefficient μi/ηHmax. Reversibility coefficient shows the relationship between reversible and irreversible magnetization processes. A universal dependence of magnetic losses for hysteresis Wh on the remanence Br with a power factor of 1.35 is confirmed for a wide range of magnetic fields strengths.

1 September 2015 in Journal of Alloys and Compounds
Verified
Journal Article
Closed access
Vladimir TsepelevVladimir Tsepelev
Vladimir Tsepelev
YSYuri Starodubtsev
Yuri Starodubtsev
VZViktor Zelenin
Viktor Zelenin
VBVladimir Belozerov
Vladimir Belozerov
VKViktor Konashkov
Viktor Konashkov