Anomalous increments of AC losses due to flux jumps

Irie, F.; Klipping, G.; Lüders, Klaus; Matsushita, Teruo; Ruppert, U.; Takeo, M.

doi:10.1109/tmag.1977.1059436

Cited by 7 publications

(8 citation statements)

References 5 publications

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“…A corresponding estimate for the variation of H, -at T =4 K yields no more than 5 -10/0 difference, which is in agreement with experimental data (see Irie et al , 1977). At …”

Section: Qualitative Theory Of Flux Jumpssupporting

confidence: 89%

“…&H~, as already noted, no flux jumps will occur (at a given value of H, or some other "priming" influence). This statement has been experimentally supported by Shiiki and Kudo (1974) and Irie et al (1977) (see Figs. 17 and 22).…”

Section: A General Commentsmentioning

confidence: 53%

“…21. Plotted in the same figure are experimental points taken from the paper by Irie et al (1977). Theory and experiment are in qualitative agreement.…”

Section: A General Commentsmentioning

confidence: 62%

“…, 1966Gandolfo et g/. , , 1969Watson, 1966Watson, , 1967%ertheimer and Gilchrist, 1967;Cbjkaba et al , 1968;McIntruff, 1968;Kwasnitza, 1973;Shimamoto, 1974;Shiiki and Kudo, 1974;Shiiki and Aihara, 1974;Sgbramangam and Chopra, 1975;Irie et al , 1977). At low H. , gH, drops to assume a constant value at H, -10' -10 Oe s ' (see Figs.…”

Section: A General Commentsmentioning

confidence: 99%

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Critical state stability in type-II superconductors and superconducting-normal-metal composites

1981

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“…A corresponding estimate for the variation of H, -at T =4 K yields no more than 5 -10/0 difference, which is in agreement with experimental data (see Irie et al , 1977). At …”

Section: Qualitative Theory Of Flux Jumpssupporting

confidence: 89%

Section: A General Commentsmentioning

confidence: 53%

“…21. Plotted in the same figure are experimental points taken from the paper by Irie et al (1977). Theory and experiment are in qualitative agreement.…”

Section: A General Commentsmentioning

confidence: 62%

Section: A General Commentsmentioning

confidence: 99%

See 2 more Smart Citations

Critical state stability in type-II superconductors and superconducting-normal-metal composites

1981

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“…As a rule, every peak in the dc magnetization (either in field or temperature) will manifest itself as a dip in the ac screening. 20,21 For comparison, in the upper panel of Fig. 2 we show similar measurements performed on a plain film (without a nanoengineered pinning array) for the same ac drives and dc field.…”

Section: B Ac Susceptibilitymentioning

confidence: 84%

Paramagnetic reentrance ofacscreening: Evidence of vortex avalanches inPbthin films

2004

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We have studied the influence of a square array of pinning centers on the dynamics of vortex avalanches in Pb thin films by means of ac-and dc-magnetization measurements. Close to the superconducting transition T c , the commensurability between the vortex lattice and the pinning array leads to the well known local increments of the critical current. As temperature T decreases, matching features progressively fade out and eventually disappear. Further down in temperature, vortex avalanches develop and dominate the magnetic response. These avalanches manifest themselves as jumps in the dc magnetization and produce a lower ac shielding, giving rise to a paramagnetic reentrance in the ac screening Ј͑T͒. Within the flux-jump regime, two subregimes can be identified. Close to the boundary where vortex avalanches develop, the field separation between consecutive jumps follows the periodicity of the pinning array and a field-and temperature-dependent screening is observed. In this regime, the response also depends on frequency f in agreement with theoretical models for magnetothermal instabilities. At low enough temperatures and fields, the screening saturates to a constant value independent of T, H, and f, where jumps are randomly distributed. We have also found that vortex instabilities occupy a larger portion of the H-T diagram in patterned samples than in films without nanoengineered pinning sites. Finally, we discuss the possible origin of the vortex avalanches and compare our results with previous experimental and theoretical studies.

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System for coil simulation measurements of losses and instabilities in superconducting wires

Ezaki¹,

Irie²,

Klipping³

et al. 1979

Cryogenics

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Anomalous increments of AC losses due to flux jumps

Cited by 7 publications

References 5 publications

Critical state stability in type-II superconductors and superconducting-normal-metal composites

Critical state stability in type-II superconductors and superconducting-normal-metal composites

Paramagnetic reentrance ofacscreening: Evidence of vortex avalanches inPbthin films

System for coil simulation measurements of losses and instabilities in superconducting wires

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