Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1007/s10948-018-4668-x

Ключевые слова: Grain boundaries, Josephson media, LCO, LSCO, Magnetic properties, Oxide superconductors, Superconductivity

Аннотация: Composite materials fabricated by annealing of nonsuperconducting ceramics La2CuO4 and La1.56Sr0.44CuO4 at 910 °C during various time are investigated. Areas of superconducting La1.85Sr0.15CuO4 phase arises at boundaries of contacting nonsuperconducting granules. The volume fraction of the superconducting phase increases with increasing annealing time. A model describing the magnetic and transport properties of the samples at low magnetic fields is constructed. The magnetotransport characteristics of obtained samples at low magnetic fields (∼ 100 Oe) are defined by weak links network formed by superconducting areas. At high fields, behavior of the system is defined by a magnetization of the disconnected superconducting islands. The average size of the superconducting areas has been estimated from an extended critical state model. © 2018 Springer Science+Business Media, LLC, part of Springer Nature

Журнал: Journal of Superconductivity and Novel Magnetism

Выпуск журнала: Vol. 31, Is. 12

Номера страниц: 3867-3874

• Bykov A.A. (Natl Res Ctr, Kurchatov Inst, Petersburg Nucl Phys Inst, 1 Mkr Orlova Roshcha, Gatchina 188300, Russia)
• Savitskaya N.E. (Natl Res Ctr, Kurchatov Inst, Petersburg Nucl Phys Inst, 1 Mkr Orlova Roshcha, Gatchina 188300, Russia)
• Terent'ev K.Yu. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
• Gokhfeld D.M. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
• Popkov S.I. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
• Petrov M.I. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)

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