Vortex pinning by large normal particles in high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>superconductors

Zablotskii, V.; Jirsa, M.; Petrenko, P. V.

doi:10.1103/physrevb.65.224508

Cited by 24 publications

(17 citation statements)

References 15 publications

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“…Above J c , the flux flow linear branch intersects J c , as shown in Fig. 1; a proposed explanation for this behavior is the existence of a dynamic pinning force equal to the static one and always opposite to the vortex motion [12,13]. The latter assumption is in contrast with the standard potential well description of the pinning center.…”

Section: Introductionmentioning

confidence: 95%

Irreversible dynamics of Abrikosov vortices in type-two superconductors

et al. 2004

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The voltage shift R f Ic with respect to the flux flow ohmic behavior of the current-voltage characteristic in type II superconductors is ascribed to the irreversible processes occurring when a vortex crosses defects. We include irreversible effects of the vortices-defects interaction into an effective law of motion. The obtained currentvoltage characteristic at finite temperature is in agreement with experimental data.

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Section: Introductionmentioning

confidence: 95%

Irreversible dynamics of Abrikosov vortices in type-two superconductors

et al. 2004

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“…Although this cannot be taken as a direct proof of causality, a similar coincidence observed previously in the case of Zrcontaminated 20 nm in size particles and the previous significant enhancement of the lowand medium-field critical currents (Muralidhar et al, 2005) supports this conclusion. In fact, it correlates with predictions of various models of vortex interaction with "large" normal particles (Campbell et al, 1991;Dew-Hughes et al, 1974;Zablotskii et al, 2002) suggesting j c ∝d -n , where d is the average particle diameter and n=1 [2] or 1/2. These facts are strong indications that the enhanced pinning is due to a collaborative pinning by the operative pinning assemble, the result being exceptionally sensitive to the smallest nanoparticles, in our work especially those containing Mo and Nb, 10 nm in size.…”

Section: Flux Pinning In Neg-123 Due To Nb 2 O 5 Nanoparticlesmentioning

confidence: 60%

“…According to another model, this dependence is V 211 /√d 211 . (Zablotskii 2002). In both cases, the particle size decrease leads to a J c enhancement.…”

Section: Second-phase Inclusions and The Associated Flux Pinning In Nmentioning

confidence: 99%

Nanoscale Pinning in the LRE-123 System - the Way to Applications up to Liquid Oxygen Temperature and High Magnetic Fields

Muralidhar¹,

Tomita²,

Jirsa³

2010

Superconductor

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“…Such a dependence follows from the model of volume pinning by large particles [3]. More exact would be to correlate J c0 with the actual size of particles in the melt-textured superconductor.…”

Section: D442mentioning

confidence: 99%

“…Main emphasis is devoted to optimizing both point-like and 'large' particles pinning systems. The effect of 'large' particles on J c is inversely proportional to a power of the the particle size [2,3]. Therefore, numerous attempts have been made to reduce the particle size below 3 µm, the commercial secondary phase powder size.…”

mentioning

confidence: 99%

Superconducting Permanent Magnets for High-temperature Operation

Jirsa

Muralidhar

2004

Czech J Phys

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LRE-BaIntroduction. The most promising materials for superconducting permanent magnets recruit from the LRE-Ba 2 Cu 3 O y family. The typical pinning structure consists of point-like disorder, 'large' particles of non-superconducting secondary phases, and twin structure. Point-like disorder, associated with collective pinning of individual vortices, enhances super-currents at intermediate magnetic fields. The secondary-phase particles, around one micrometer in size, are most effective vortex traps at low magnetic fields. Twin planes represent a specific correlated disorder that has a special effect on the J(B) profile, either reducing height of the secondary peak or filling the dip between the secondary and central peaks. In the present work we summarize recent results obtained on ternary RE-Ba 2 Cu 3 O y compounds, where three different light-rare-earth elements (La, Sm, Nd, Eu, Gd) occupy the rare-earth site.Experimental results. Although technology plays most important role in the recent achievements in this field, we have no space to go into details here. These can be found in [1].It has been verified that mixing together several LRE elements at the rare-earth site of the LRE-123 compounds hinders neither appearance of superconductivity nor the melt texture growth. In most cases such complex compounds behave like a single-LRE 123 material. In any case, the bulk ternary LRE-123 compounds produced by oxygen-control melt-growth method exhibit excellent electromagnetic

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Vortex pinning by large normal particles in high-Tcsuperconductors

Cited by 24 publications

References 15 publications

Irreversible dynamics of Abrikosov vortices in type-two superconductors

Irreversible dynamics of Abrikosov vortices in type-two superconductors

Nanoscale Pinning in the LRE-123 System - the Way to Applications up to Liquid Oxygen Temperature and High Magnetic Fields

Superconducting Permanent Magnets for High-temperature Operation

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