Vortex Melting and the Liquid State in Yba2Cu3Ox

Crabtree, G. W.

doi:10.1007/978-94-011-4558-9_17

Cited by 6 publications

(6 citation statements)

References 60 publications

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“…Figure 3 displays magnetoresistance measurements performed with applied fields up to 9 T with the magnetic field parallel to the c-axis, the current parallel to the ab plane and with a pair of voltage taps measuring the resistivity of one of the joined single domains, and a second pair measuring across the weld. The field-dependent broadening typically observed in YBCO single crystals and single domain melt processed YBCO [25,26] is also found in the present case. However, it is important to note that no additional 'foot' structure is observed coming from the joint which evidences the high quality of the superconducting joint [4].…”

Section: Resultssupporting

confidence: 83%

High critical current YBa₂Cu₃O₇artificial joints using Ag foils as welding agent

Iliescu¹,

Granados²,

Bartolomé³

et al. 2003

Supercond. Sci. Technol.

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A new high quality joining technique of melt processed YBCO has been developed based on interfacial melting induced by a metallic silver foil inserted between two single domain YBCO tiles. This simple technique allows joining large monoliths to form the complex-shaped pieces required for many power applications. Hall probe magnetic flux profile analysis under magnetic field and high field magnetoresistance measurements demonstrate that the superconducting behaviour of the joint is indistinguishable from the bulk.

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Section: Resultssupporting

confidence: 83%

High critical current YBa₂Cu₃O₇artificial joints using Ag foils as welding agent

Iliescu¹,

Granados²,

Bartolomé³

et al. 2003

Supercond. Sci. Technol.

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“…A triple point joining the BGS, VG solid, and PEL phases can then be identified. We note that beyond this triple point, in sparsely twinned single crystals, 47 the first-order melting transition has been recovered when crossing to the solid phase from the EL phase.…”

Section: Vortex Liquid Phase Diagrammentioning

confidence: 78%

Vortex liquid entanglement in twinnedYBa2Cu3O7
Puig
¹
,
Galante
²
,
González
³

et al. 1999
Phys. Rev. B
34
1
15
1
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The angular dependence of the in-plane resistivity (T,H,) of melt textured YBa 2 Cu 3 O 7 /Y 2 BaCuO 5 composites has been measured in a large range of magnetic fields and temperatures and from them, the intrinsic anisotropy of the superconducting state has been verified following the anisotropic Ginzburg-Landau approach. The influence of correlated defects like twin boundaries and quenched disorder generated by Y 2 BaCuO 5 precipitates on the pinning behavior of these composites in the liquid vortex state is analyzed, and the corresponding phase diagram is determined and compared to that of twinned single crystals. We show that the irreversibility line displays an upwards shift due to twin boundary pinning enabling to define a ''quenched'' Bose glass transition. A new region in the vortex liquid state is identified where twin boundary pinning defines a partially entangled liquid vortex state characterized by a short-range c-axis vortex coherence. The transition to the entangled liquid phase is experimentally determined. The relevance of this depinning line and its unique position with respect to twinned single crystals is discussed. ͓S0163-1829͑99͒01741-5͔

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“…A new low temperature glassy phase, the Bose-glass state, was predicted to exist where vortices are localized in the columnar defects. It was expected, and indeed experimentally observed, that the new transition line H BG (T ) pushes upwards the melting line observed in clean single crystals and thus reduces the wide region of the vortex liquid phase observed when H c [1,6].…”

mentioning

confidence: 69%

“…Clean YBa 2 Cu 3 O 7 single crystals have a first-order phase transition when the ordered flux lattice melts. When either natural defects (twin boundaries or oxygen vacancies) or artificial defects induced by irradiation (protons, heavy ions or electrons) are introduced, the phase diagram is profoundly modified and the so-called 'irreversibility line' separating the vortex liquid state from the solid vortex phase is either shifted upwards or downwards [1,2]. In particular, the modification of vortex behavior due to the presence of columnar defects has been theoretically and experimentally investigated by several authors.…”

mentioning

confidence: 99%

Multidirectional in-plane linear correlated disorder pinning of vortices in YBa₂Cu₃O₇

Figueras

Puig

Obradors

et al. 2007

Supercond. Sci. Technol.

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We have measured the anisotropic magnetoresistance when the magnetic field and the Lorentz force rotate parallel to the CuO 2 planes in YBa 2 Cu 3 O 7 crystals having partial dislocations aligned along 100 directions, created by high oxygen pressure annealing treatments, and twin boundaries aligned parallel to 110 axes. These measurements demonstrate that aligned defects behave as linear correlated disorder vortex pinning centers by anisotropically shifting upwards the irreversibility line of YBa 2 Cu 3 O 7 when the vortices are confined in the CuO 2 planes. The anisotropic vortex activation energy in the liquid state has been found to follow the same in-plane periodicity as the irreversibility line. Our results demonstrate that a set of multidirectional linear vortex pinning centers leading to multiple in-plane Bose glass-like transitions can coexist.

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Vortex Melting and the Liquid State in Yba2Cu3Ox

Cited by 6 publications

References 60 publications

High critical current YBa₂Cu₃O₇artificial joints using Ag foils as welding agent

High critical current YBa₂Cu₃O₇artificial joints using Ag foils as welding agent

Vortex liquid entanglement in twinnedYBa2Cu3O7
Puig
¹
,
Galante
²
,
González
³

et al. 1999
Phys. Rev. B
34
1
15
1
View full text Add to dashboard Cite

Multidirectional in-plane linear correlated disorder pinning of vortices in YBa₂Cu₃O₇

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Vortex Melting and the Liquid State in Yba2Cu3Ox

Cited by 6 publications

References 60 publications

High critical current YBa2Cu3O7artificial joints using Ag foils as welding agent

High critical current YBa2Cu3O7artificial joints using Ag foils as welding agent

Vortex liquid entanglement in twinnedYBa2Cu3O7Puig1, Galante2, González3 et al. 1999Phys. Rev. B341151View full textAdd to dashboardCite

Multidirectional in-plane linear correlated disorder pinning of vortices in YBa2Cu3O7

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High critical current YBa₂Cu₃O₇artificial joints using Ag foils as welding agent

High critical current YBa₂Cu₃O₇artificial joints using Ag foils as welding agent

Vortex liquid entanglement in twinnedYBa2Cu3O7
Puig
¹
,
Galante
²
,
González
³

et al. 1999
Phys. Rev. B
34
1
15
1
View full text Add to dashboard Cite

Multidirectional in-plane linear correlated disorder pinning of vortices in YBa₂Cu₃O₇