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Fendrich, J. A.; Kwok, W. K.; Giapintzakis, J.; Beek, C.J. van der; Винокур, В. М.; Fleshler, S.; Welp, U.; Viswanathan, H. K.; Crabtree, G. W.

doi:10.1103/physrevlett.74.1210

Cited by 161 publications

(94 citation statements)

References 17 publications

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“…In this case the abovementioned point is ordinary rather than singular for the free energy of the vortex system, since a continuous phase transition separating the disordered vortex solid phase from the vortex liquid does not seem to exist. 49,50 Thus, there is only one phase transition line which describes both the melting and the order-disorder transitions. This unified line originates from the melting curve of clean superconductors, gradually evolving from it as the strength of the quenched disorder increases.…”

Section: B Approximate Formulas Discussionmentioning

confidence: 99%

Peak effect, vortex-lattice melting line, and order-disorder transition in conventional and high-Tcsuperconductors

2001

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We investigate the order-disorder transition line from a Bragg glass to an amorphous vortex glass in the H − T phase diagram of three-dimensional type-II superconductors taking into account both pinning-caused and thermal fluctuations of the vortex lattice. Our approach is based on the Lindemann criterion and on results of the collective pinning theory and generalizes previous work of other authors. It is shown that the shapes of the order-disorder transition line and the vortex lattice melting curve are determined only by the Ginzburg number, which characterizes thermal fluctuations, and by a parameter which describes the strength of the quenched disorder in the fluxline lattice. In the framework of this unified approach we obtain the H − T phase diagrams for both conventional and high-Tc superconductors. Several well-known experimental results concerning the fishtail effect and the phase diagram of high-Tc superconductors are naturally explained by assuming that a peak effect in the critical current density versus H signalizes the order-disorder transition line in superconductors with point defects.

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Section: B Approximate Formulas Discussionmentioning

confidence: 99%

Peak effect, vortex-lattice melting line, and order-disorder transition in conventional and high-Tcsuperconductors

2001

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“…While a relative ordered vortex phase ͑Bragg glass͒ is known to exist in clean samples at low magnetic fields, and the melting transition is first order, 2,3 the presence of disorder enhances the glass like properties of the vortex solid, and turns the melting transition into second order. [4][5][6] Correlated disorder, due to high energy ion irradiation or to twin boundaries, promotes vortex confinement and stabilizes a Bose glass phase at low magnetic fields. 5,[7][8][9] Point disorder, on the other hand, favors vortex meandering, which may even result in a very disordered entangled vortex solid at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

Vortex liquid entanglement in irradiatedYBa2Cu3O7
Sefrioui
¹
,
Arias
²
,
González
³

et al. 2001
Phys. Rev. B
43
4
23
1
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Epitaxial YBa 2 Cu 3 O 7 thin films, grown by high-pressure dc sputtering, are irradiated with He ϩ ions at 80 keV with doses between 10 14 and 10 15 cm Ϫ2 . Irradiation reduces the critical temperature but it does not modify the carrier concentration. Angle-dependent resistivity is used to show that the mass anisotropy does not change upon irradiation. The melting transition in magnetic fields applied parallel to the c axis is analyzed by I-V critical scaling, and all irradiated and nonirradiated samples show a three-dimensional vortex glass transition with the same critical exponents. The dissipation in the liquid state is analyzed in terms of the activation energy of the magnetoresistance in a perpendicular magnetic field. While as-grown samples show an activation energy depending as 1/H on the applied magnetic field, irradiated samples show a dependence as 1/H 0.5 , characteristic of plastic deformation of vortices. This is discussed in terms of the point disorder introduced by ion irradiation.

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“…The effect of disorder becomes stronger at lower temperatures and the melting transition is suppressed. Suppression of vortex lattice melting by disorder is also reported in electron irradiated YBa2Cu3O7-y [9]. The critical temperature where the vortex lattice melting terminates and crossovers to the peak effect depends on crystals and it becomes higher as the crystal contains more disorder.…”

Section: Methodsmentioning

confidence: 76%

Pressure Effect on the Vortex Phase Diagram in Bi2Sr2CaCu2O8+y.

Yamada

Tamegai

Ooi

et al. 1998

THE REVIEW OF HIGH PRESSURE SCIENCE AND TECHNOLOGY

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Vortex Liquid State in an Electron Irradiated UntwinnedYBa2Cu3

Cited by 161 publications

References 17 publications

Peak effect, vortex-lattice melting line, and order-disorder transition in conventional and high-Tcsuperconductors

Peak effect, vortex-lattice melting line, and order-disorder transition in conventional and high-Tcsuperconductors

Vortex liquid entanglement in irradiatedYBa2Cu3O7
Sefrioui
¹
,
Arias
²
,
González
³

et al. 2001
Phys. Rev. B
43
4
23
1
View full text Add to dashboard Cite

Pressure Effect on the Vortex Phase Diagram in Bi2Sr2CaCu2O8+y.

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Vortex Liquid State in an Electron Irradiated UntwinnedYBa2Cu3

Cited by 161 publications

References 17 publications

Peak effect, vortex-lattice melting line, and order-disorder transition in conventional and high-Tcsuperconductors

Peak effect, vortex-lattice melting line, and order-disorder transition in conventional and high-Tcsuperconductors

Vortex liquid entanglement in irradiatedYBa2Cu3O7Sefrioui1, Arias2, González3 et al. 2001Phys. Rev. B434231View full textAdd to dashboardCite

Pressure Effect on the Vortex Phase Diagram in Bi2Sr2CaCu2O8+y.

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Product

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Vortex liquid entanglement in irradiatedYBa2Cu3O7
Sefrioui
¹
,
Arias
²
,
González
³

et al. 2001
Phys. Rev. B
43
4
23
1
View full text Add to dashboard Cite