Peculiarities of Fe intercalation in YBa2Cu3−xFexOy for small values X

Asaturian, R.A.; Sarkissian, Armand; Ignatian, E.L.; Begoian, K.G

doi:10.1016/0038-1098(95)00280-4

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…So, a slight change of superconducting transition temperature T c is observed for the lower values of ionic size (R = Y, Gd). But, the further increase of ionic size leads to the abrupt decreasing of T c , and the structure from orthorhombic to tetragonal phase occurs, in agreement with the present data for R = Nd and La [55][56][57].…”

Section: Resultssupporting

confidence: 92%

Structural and Fluctuation Induced Excess Conductivity in R:1113 Superconductors

Sedky

Youssif

2016

Braz J Phys

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Section: Resultssupporting

confidence: 92%

Structural and Fluctuation Induced Excess Conductivity in R:1113 Superconductors

Sedky

Youssif

2016

Braz J Phys

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“…Great attention is focused on the Fe doping owing to the co-existence of magnetic ordering by Fe sublattice and superconductivity. [33][34][35] It is found that Fe atom attracts additional oxygen atoms and consequently its coordination number is increased. A slight change of superconducting transition temperature T c is observed for the lower values of Fe content (≤ 0.05).…”

Section: Resultsmentioning

confidence: 99%

Paraconductivity study in ErBa ₂ Cu _{3−
x} M _x O _7−δ ( M = Zn, Fe) superconductors

Sedky

Mohamed

2013

Chinese Phys. B

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We report here the paraconductivity of ErBa 2 Cu 3−x M x O 7−δ (M = Zn and Fe) superconductors. The logarithmic plots of excess conductivity ∆σ and reduced temperature C reveal two different exponents corresponding to crossover temperature as a result of shifting the order parameter from 2 to 3. The first exponent in the normal field region is close to 1, in which the order parameter dimensionality (OPD) is 2. The second exponent in the critical field region is close to 0.5, in which the OPD is 3. The coherence length, interlayer coupling, interlayer separation and carrier concentration decrease with increasing doping content, and their values for Fe samples are different from those of Zn samples. While anisotropy is increased with increasing doping content, it is generally higher for a Zn sample than that for an Fe sample. We also estimate several physical parameters such as upper critical magnetic fields in the a-b plane and along the c axis (B ab and B c ), and critical current density J at 0 K. Although B ab and B c are generally increased with doping content increasing, the value of B ab is found to be twice more than that of B c . A similar behavior is obtained for J (0 K) and its value is higher in the Fe sample than that in the Zn sample. These results are discussed in terms of oxygen deficiency, localization of carriers, and flux pinning, which are produced by doping.

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“…Investigation [36,37] of the dependence of Cu 2+ EPR signal intensity with simultaneous registration of X-ray Absorption Near Edges Structure (XANES) at the Cu 2+ k edges of the same signals [37], as well as Cu 2+ EPR signal intensity dependence on the substitution degree of Cu 2+ (I) in Y 1 Ba 2 Cu 3 O 7-x by Fe atoms showed [37] that EPR signals correspond to the Cu 2+ (I) in the chains and not to the Cu 2+ (II) in the CuO 2 planes.…”

Section: The Influence Of the Degree Of Filling On Valence State mentioning

confidence: 99%

Intercalated Nanocomposites Based on High-Temperature Superconducting Ceramics and Their Properties

2009

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High temperature superconducting (SC) nanocomposites based on SC ceramics and various polymeric binders were prepared. Regardless of the size of the ceramics’ grains, the increase of their amount leads to an increase of resistance to rupture and modulus and a decrease in limiting deformation, whereas an increase in the average ceramic grain size worsens resistance properties. The SC, thermo-chemical, mechanical and dynamic-mechanical properties of the samples were investigated. Superconducting properties of the polymer ceramic nanocomposites are explained by intercalation of macromolecule fragments into the interstitial layer of the ceramics’ grains. This phenomenon leads to a change in the morphological structure of the superconducting nanocomposites.

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Peculiarities of Fe intercalation in YBa2Cu3−xFexOy for small values X

Cited by 7 publications

References 11 publications

Structural and Fluctuation Induced Excess Conductivity in R:1113 Superconductors

Structural and Fluctuation Induced Excess Conductivity in R:1113 Superconductors

Paraconductivity study in ErBa ₂ Cu _{3−
x} M _x O _7−δ ( M = Zn, Fe) superconductors

Intercalated Nanocomposites Based on High-Temperature Superconducting Ceramics and Their Properties

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Peculiarities of Fe intercalation in YBa2Cu3−xFexOy for small values X

Cited by 7 publications

References 11 publications

Structural and Fluctuation Induced Excess Conductivity in R:1113 Superconductors

Structural and Fluctuation Induced Excess Conductivity in R:1113 Superconductors

Paraconductivity study in ErBa 2 Cu 3− x M x O 7−δ ( M = Zn, Fe) superconductors

Intercalated Nanocomposites Based on High-Temperature Superconducting Ceramics and Their Properties

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Paraconductivity study in ErBa ₂ Cu _{3−
x} M _x O _7−δ ( M = Zn, Fe) superconductors