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An extended critical state model: Asymmetric magnetization loops and field dependence of the critical current of superconductors

Gokhfeld, D. M.

/ D. M. Gokhfeld // Phys. Solid State. - 2014. - Vol. 56, Is. 12. - P. 2380-2386, DOI 10.1134/S1063783414120129. - Cited References: 37 . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter

Рубрики:
CRITICAL-CURRENT DENSITY
   HIGH-TEMPERATURE SUPERCONDUCTORS
   II SUPERCONDUCTORS
   SURFACE-BARRIER
   MGB2
   TRANSPORT
   MOTION
   J(C)
   PEAK

Аннотация: An extended critical state model has been developed. The model has considered the equilibrium magnetization of a surface layer and the magnetization of the central region of a superconducting sample. The magnetic flux distributions in the sample have been calculated. An analytical dependence of the critical current density on the magnetic field with different behaviors in strong and weak fields has been proposed. A relation of the asymmetry of the magnetization loops and the critical current density to the sample size has been established. The model is applicable to the parameterization of magnetization loops of single-crystal and polycrystalline superconductors.

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Доп.точки доступа:
Гохфельд, Денис Михайлович

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Magnetization asymmetry of type-II superconductors in high magnetic fields

/ D. M. Gokhfeld [et al.] // J. Appl. Phys. - 2011. - Vol. 109, Is. 3. - Ст. 33904, DOI 10.1063/1.3544038. - Cited References: 23. - D. M. Gokhfeld is thankful to S. A. Satzuk and Yu. S. Gokhfeld for discussions. The work is supported by Project No. 7 of RAS Program "Quantum physics of condensed matter," Federal Target Program " Research and scientific-pedagogical cadres of Innovative Russia" and Grant No. 13 of Lavrentyev competition of young researchers of SB RAS. . - ISSN 0021-8979

РУБ Physics, Applied

Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTORS
   CRITICAL-STATE MODEL
   CRITICAL-CURRENT DENSITIES
   SURFACE-BARRIER
   TRANSPORT
Кл.слова (ненормированные):
Field distribution -- High magnetic fields -- Inhomogeneous distribution -- Magnetization loops -- Pinning forces -- Thermal equilibriums -- Type II superconductors -- Lead -- Magnetic fields -- Superconducting materials -- Superconductivity -- Magnetization

Аннотация: Inhomogeneous distribution of the pinning force in superconductor results in a magnetization asymmetry. A model considering the field distribution in superconductor was developed and symmetric and asymmetric magnetization loops of porous and textured Bi1.8Pb0.3Sr1.9Ca2Cu3Ox were fitted. It is found that the thermal equilibrium magnetization realizes in crystals smaller than some size depending on temperature and magnetic field. (C) 2011 American Institute of Physics. [doi:10.1063/1.3544038]

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Держатели документа:
[Gokhfeld, D. M.
Balaev, D. A.
Petrov, M. I.
Popkov, S. I.
Shaykhutdinov, K. A.
Val'kov, V. V.] LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
ИФ СО РАН
L. V. Kirensky Institute of Physics SB RAS, Akademgorodok 50/38, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Balaev, D. A.; Балаев, Дмитрий Александрович; Petrov, M. I.; Петров, Михаил Иванович; Popkov, S. I.; Попков, Сергей Иванович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Val'kov, V. V.; Вальков, Валерий Владимирович

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