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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Gokhfeld D. M., Popkov S. I., Shaikhutdinov K. A., Klinkova L. A., Zherikhina L. N., Tsvokhrebov A. M.
Заглавие : Increase in the magnetization loop width in the Ba0.6K0.4BiO3 superconductor: Possible manifestation of phase separation
Место публикации : J. Exp. Theor. Phys.: MAIK Nauka-Interperiodica / Springer, 2014. - Vol. 118, Is. 1. - P.104-110. - ISSN 1063-7761, DOI 10.1134/S1063776114010038. - ISSN 1090-6509
Примечания : Cited References: 39
Предметные рубрики: (K,BA)BIO3 SINGLE-CRYSTALS
II SUPERCONDUCTORS
BISMUTH-OXIDE
PEAK
DENSITY
TC
Аннотация: The magnetization of Ba0.6K0.4BiO3 samples in fields up to 90 kOe in the temperature range from 2 to 30 K is investigated. It is shown that the observed increase in the width of the magnetization loop can be explained by a decrease in the phase nonuniformity upon an increase in the magnetic field. The asymmetric hysteretic dependence of magnetization with the secondary peak was successfully described by the extended critical state model taking into account the phase separation in the superconductor.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gokhfeld D. M.
Заглавие : An extended critical state model: Asymmetric magnetization loops and field dependence of the critical current of superconductors
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2014. - Vol. 56, Is. 12. - P.2380-2386. - ISSN 1063-7834, DOI 10.1134/S1063783414120129. - ISSN 1090-6460
Примечания : Cited References: 37
Предметные 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gokhfeld D. M., Semenov S. V., Terentyev K. Yu., Yakimov I. S., Balaev D. A.
Заглавие : Interplay of magnetic and superconducting subsystems in Ho-doped YBCO
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk Territory, Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project "Superconducting properties of YBCO incorporated by paramagnetic rare-earth elements" [20-42-240008]
Место публикации : J. Supercond. Nov. Magn. - 2021. - Vol. 34. Is. 10. - P.2537-2543. - ISSN 1557-1939, DOI 10.1007/s10948-021-05954-3. - ISSN 1557-1947(eISSN)
Примечания : Cited References: 26. - This work was supported by the Russian Foundation for Basic Research and the Government of the Krasnoyarsk Territory, Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project "Superconducting properties of YBCO incorporated by paramagnetic rare-earth elements" No. 20-42-240008
Предметные рубрики: TEMPERATURE
TRANSPORT
PEAK
DY
SUSCEPTIBILITY
TRANSITION
BEHAVIOR
Аннотация: Superconducting and paramagnetic contributions to the magnetization of polycrystalline Y1−xHoxBa2Cu3O7−δ samples were investigated. The superconductivity is responsible for a partial screening of magnetic ions from an external magnetic field and for a possible sinking of antiferromagnetic correlations between these ions. Magnetic moments of Ho ions influence on a peak effect induced by the order–disorder transition of the Abrikosov vortex lattice. The critical current density and the critical temperature of YBCO are not changed by the Ho doping.
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