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Chabanenko, V. V.; Puźniak, R.; Nabiałek, A.; Vasiliev, S.; Rusakov, V. F.; Loh, Huanqian; Szymczak, R.; Szymczak, H.; Jun, J.; Karpiński, J.; Finkel, V. A.

doi:10.1023/a:1022236117354

Cited by 42 publications

(23 citation statements)

References 18 publications

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“…11,12 In bulk MgB 2 , less frequent but very large saw-tooth-shaped flux jump is observed over a wide range of the hysteresis loop. 10 But for MgB 2 thin films, a small flux jump with an irregular shape rather than a saw-tooth shape appears very frequently, and the size of the jump is much smaller than that of the bulk. 9,[13][14][15][16] Previously, the magnetic field intervals between jumps, B f j , in the M-H loop of a bulk superconductor were explained by a theory based on an adiabatic approximation.…”

Section: Saw-tooth Pattern From Flux Jumps Observed By High Resolutiomentioning

confidence: 98%

“…[1][2][3][4][5][6][7][8][9] Although this flux jump has been observed in a number of superconducting films, it has rarely been observed in bulk superconductors. 10 The shapes of the flux jump of thin films 9 and the bulk 10 in the magnetic hysteresis ͑M-H͒ loops are known to be different. Very large saw-tooth shaped flux jump is observed in a bulk superconductor, but not in a thin film.…”

Section: Saw-tooth Pattern From Flux Jumps Observed By High Resolutiomentioning

confidence: 99%

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Saw-tooth pattern from flux jumps observed by high resolution M-H curves in MgB2 thin films

Lee

Jung

et al. 2010

Journal of Applied Physics

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While flux jumps have been observed in the magnetic hysteresis loops of superconductors, a saw-tooth pattern of the flux jump is known to appear only in a bulk superconductor. But in this study, we were able to observe the saw-tooth pattern in MgB2 thin film with the careful data acquisition method enhancing the data taking capability and report the details of the distribution of the field interval between jumps Bfj, and the size of the flux jump, Mfj. The theory based on Bean’s model in the adiabatic approach was adapted and it was compared with experimental results. In addition, we observe the cross-over between the saw-tooth pattern and a rounded saw-tooth pattern, as a byproduct. A patterns diagram of the vortex jump was drawn on the H-T plane.

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Section: Saw-tooth Pattern From Flux Jumps Observed By High Resolutiomentioning

confidence: 98%

Section: Saw-tooth Pattern From Flux Jumps Observed By High Resolutiomentioning

confidence: 99%

Saw-tooth pattern from flux jumps observed by high resolution M-H curves in MgB2 thin films

Lee

Jung

et al. 2010

Journal of Applied Physics

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“…Однако справедливость подобного тезиса далеко не очевидна, и вопрос о влиянии температуры и внеш-него магнитного поля на характер эволюции вихревой структуры гранулярных BCS-сверхпроводников MgB 2 окончательно не решен. Несмотря на огромное коли-чество работ, посвященных попыткам построения фазо-вых H−T -диаграмм гранулярных BCS-сверхпроводников MgB 2 при низких температурах (см., например, [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]), до сих пор не установлено положение линий H c1g (H c1A ) и H c2J на фазовой H−T -диаграмме. Более того, подвергается сомнению и само существова-ние " слабых связей" [иными словами, наличие линии H c2J (T ) на H−T -диаграмме] в случае гранулярного BCS-сверхпроводника MgB 2 [22][23][24][25][26][27][28].…”

Section: G (T H) ≫ I J (T H)unclassified

Фазовые переходы в гранулярном BCS-сверхпроводнике MgB-=SUB=-2-=/SUB=- в слабых магнитных полях

Derevianko¹,

Sungurov²,

Sukhareva³

et al. 2017

Физика Твердого Тела

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Изучен характер температурных зависимостей электросопротивления гранулярных BCS-сверхпроводников MgB2 при ~35-45 K во внешних магнитных полях Hext напряженностью до ~2 kOe. Обнаружен эффект повышения ширины сверхпроводящего перехода Delta Tc при росте Hext. Установлено наличие системы "слабых связей" (weak links) в гранулярных сверхпроводниках на основе MgB2. На основании полученных экспериментальных данных установлена принадлежность гранулярного BCS-сверхпроводника MgB2 к двухуровневым сверхпроводящим системам, построена фазовая H-T-диаграмма. DOI: 10.21883/FTT.2017.02.44038.171

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“…For the factor gðHÞ which defines the field dependence of the critical current one generally considers various functions. 4,6,14,15 The most common of them are the Kim-Anderson dependence…”

Section: Theoretical Modelmentioning

confidence: 99%