Correlation Between Enhanced ${\rm T}_{\rm c}$, AC Magnetic Irreversibility Line and Heat Treatment in High ${\rm T}_{\rm c}$ Superconductors

Yakoubi, Essediq Youssef El; Nafidi, A.; Braigue, M.; Morghi, R.; Chaib, H.; Hemine, J.; Vinod, M S; Gouti, T. El; Suryanarayanan, R.

doi:10.1109/tasc.2010.2088371

Cited by 1 publication

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References 9 publications

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“…in Figure 6(b) for example, we can see that the width ΔT p at half maximum of the transition in χ″(T) (see Table 1) was smaller in the samples [AO] at all H dc and the peak T p shifted less than in the sample [O]. Figure 8 shows the field H dc as a function of t = T p /T c with an enhancement of the irreversibility line due to argon treatment for x ≥ 0.5 [14]. The data can be analyzed with the help of following relation H = K′ (1 − t) n [15].…”

Section: Imaginary Part Of the Ac Magnetic Susceptibility And Irrevermentioning

confidence: 95%

Effects of Isovalent Substitutions and Heat Treatments on Tc, Orthorhombicity, Resistivity, AC Magnetic Shielding and Irreversibility Line in High-Tc Superconductors

Nafidi¹

2018

Superfluids and Superconductors

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We report here the preparation, X-ray diffraction with Rietveld refinement, AC magnetic susceptibility (χ ac = χ′ + iχ″), resistivity, iodometric measurements and effect of heat treatments in (Y 1−x Sm x)SrBaCu 3 O 6+z. Each sample has undergone two types of heat treatment: oxygen annealing [O] and argon annealing followed by oxygen annealing [AO]. For each x, the [AO] heat treatment increases the orthorhombicity ε = (b − a)/(b + a) (for 0 ≤ x ≤ 1), T c (for x ≥ 0.4) and reduced the linear resistivity parameters with a diminution of the interaction of holes with phonons. At all T < T c and for any applied field H dc , we observed an enhancement of AC magnetic shielding and the irreversibility line in the samples [AO] for x > 0.5, revealing an improvement in the pinning properties. Remarkable correlations were found. In the [AO] samples, the measured data are explained by the increase in phase purity, in cationic and chain oxygen ordering, p sh and the decrease in d[Cu(1)─(Sr/Ba)]. Keywords: chain oxygen order-disorder, heat treatments control of T c , Rietveld refinement structure, phase transition, irreversibility line, AC magnetic shielding, resistivity, (Y 1−x Sm x)(SrBa)Cu 3 O 6+z type-II superconductors

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Section: Imaginary Part Of the Ac Magnetic Susceptibility And Irrevermentioning

confidence: 95%

Effects of Isovalent Substitutions and Heat Treatments on Tc, Orthorhombicity, Resistivity, AC Magnetic Shielding and Irreversibility Line in High-Tc Superconductors

Nafidi¹

2018

Superfluids and Superconductors

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Correlation Between Enhanced ${\rm T}_{\rm c}$, AC Magnetic Irreversibility Line and Heat Treatment in High ${\rm T}_{\rm c}$ Superconductors

Cited by 1 publication

References 9 publications

Effects of Isovalent Substitutions and Heat Treatments on Tc, Orthorhombicity, Resistivity, AC Magnetic Shielding and Irreversibility Line in High-Tc Superconductors

Effects of Isovalent Substitutions and Heat Treatments on Tc, Orthorhombicity, Resistivity, AC Magnetic Shielding and Irreversibility Line in High-Tc Superconductors

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