High critical transport currents of melt textured YBCO up to 6000 A

Porcar, Laureline; Bourgault, D.; Barbut, Jérôme; Barrault, M.; Germi, P.; Tournier, R.

doi:10.1016/s0921-4534(96)00720-4

Cited by 35 publications

(16 citation statements)

References 15 publications

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“…The YBCO sample was prepared following the same procedures described elsewhere. 6 The sputtered electrodes, depicted in Fig. 1, have a width of 1 mm and a mean separation between 0.4 and 0.8 mm.…”

Section: Methodsmentioning

confidence: 99%

Anomalous time relaxation of the nonvolatile resistive state in bipolar resistive-switching oxide-based memories

2012

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We have studied long time relaxation effects on the nonvolatile resistance state produced by resistive switching in devices composed by ceramic YBa 2 Cu 3 O 7−δ and La 0.7 Sr 0.3 MnO 3 /metal (Au, Pt, Ag) interfaces. The time relaxation can be described by a stretched exponential law that is characterized by a power exponent (n) close to 1/2. We found that the characteristic time (τ ) increases with increasing temperature and applied power. The origin of the relaxation effect can be related to oxygen diffusion processes, which were recently associated with the mechanism of bipolar switching in complex oxide interfaces. We argue that the anomalous behavior can be understood in terms of diffusion of oxygen ions (or oxygen vacancies) on a two-dimensional surface with a temperature-dependent density of trapping centers, which may correspond, physically, to the diffusion along grain boundaries.

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Section: Methodsmentioning

confidence: 99%

Anomalous time relaxation of the nonvolatile resistive state in bipolar resistive-switching oxide-based memories

2012

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“…Large samples can be oriented by magnetic texturing. Superconducting critical current properties of such bulk materials were studied [17][18][19][20]. The irreversible magnetization data also indicates steady improvement in the superconducting properties of the material with increasing annealing temperature up to 1055°C.…”

Section: Case Of Y1ba2cu3o7-δmentioning

confidence: 99%

“…A very small value of tsn/τns undervalues the time t by a factor 2 or 3 and has a negligible effect in a logarithmic scale. The first crystallization occurs when J = (v.tsn) -1 in the presence of one intrinsic growth nuclei in the sample volume v. The critical energy barrier is obtained using (5) and the values of εnm as a function of θ 2 ; tsn is deduced from (20) with ln(Kls) given by (3).…”

Section: Crystallization Of Melts Induced By Intrinsic Nuclei At T ≤ Tmmentioning

confidence: 99%

Magnetic Texturing of High-Tc Superconductors

Porcar¹,

Rango²,

Bourgault³

et al. 2012

Superconductors - Materials, Properties and Applications

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“…51 For the reference resistor, this component is noticeable because its own resistance is very small. We deduced its inductance from the deviation of the V-I curve from Ohmic behavior when a highresistive element is placed instead of the sample.…”

Section: A Melt-textured Samplesmentioning

confidence: 99%

Normal-superconducting transition induced by high current densities inYBa2Cu3O
González
¹
,
Viña
²
,
Currás
³

et al. 2003
Phys. Rev. B
21
0
6
0
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Current-voltage characteristics of top-seeded melt-textured YBa 2 Cu 3 O 7Ϫ␦ are presented. The samples were cut out of centimetric monoliths. Films characteristics were also measured on microbridges patterned on thin films grown by dc sputtering. For both types of samples, a quasidiscontinuity or quenching was observed for a current density J* several times the critical current density J c . Though films and bulks differ much in their magnitude of both J c and J*, a proposal is made as to a common intrinsic origin of the quenching phenomenon. The unique temperature dependence observed for the ratio J*/J c , as well as the explanation of the prequenching regime in terms of a single dissipation model, lends support to our proposal.

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High critical transport currents of melt textured YBCO up to 6000 A

Cited by 35 publications

References 15 publications

Anomalous time relaxation of the nonvolatile resistive state in bipolar resistive-switching oxide-based memories

Anomalous time relaxation of the nonvolatile resistive state in bipolar resistive-switching oxide-based memories

Magnetic Texturing of High-Tc Superconductors

Normal-superconducting transition induced by high current densities inYBa2Cu3O
González
¹
,
Viña
²
,
Currás
³

et al. 2003
Phys. Rev. B
21
0
6
0
View full text Add to dashboard Cite

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High critical transport currents of melt textured YBCO up to 6000 A

Cited by 35 publications

References 15 publications

Anomalous time relaxation of the nonvolatile resistive state in bipolar resistive-switching oxide-based memories

Anomalous time relaxation of the nonvolatile resistive state in bipolar resistive-switching oxide-based memories

Magnetic Texturing of High-Tc Superconductors

Normal-superconducting transition induced by high current densities inYBa2Cu3OGonzález1, Viña2, Currás3 et al. 2003Phys. Rev. B21060View full textAdd to dashboardCite

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About

Normal-superconducting transition induced by high current densities inYBa2Cu3O
González
¹
,
Viña
²
,
Currás
³

et al. 2003
Phys. Rev. B
21
0
6
0
View full text Add to dashboard Cite