SiO2 nanoparticles addition effect on microstructure and pinning properties in YBa2Cu3Oy

Salem, M. K.; Hannachi, E.; Slimani, Y.; Hamrita, A.; Zouaoui, M.; Bessaïs, L.; Salem, M. Ben; Azzouz, F. Ben

doi:10.1016/j.ceramint.2013.10.103

Cited by 89 publications

(6 citation statements)

References 39 publications

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“…Based on the Dew-Hughes model, the flux pinning mechanism can be recognized as volume pinning of Dj type for p = 1 and q = 1, and normal point pinning for p = 1 and q = 2, respectively. Therefore, the change of main flux pinning mechanism from the volume pinning of Dj type to the normal point pinning mechanism can be deduced [42]. On the other hand, according to the Dew-Hughes model, the peak position of F p appears at a reduced field value of h = 0.5 for volume pinning of Dj type and h = 0.33 for point pinning mechanism.…”

Section: Flux Pinning Propertiesmentioning

confidence: 99%

Influences of Yb substitution on the intergrain connections and flux pinning properties of Bi-2212 superconductors

Zhang

Hao

et al. 2015

Physica C: Superconductivity and its Applications

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Section: Flux Pinning Propertiesmentioning

confidence: 99%

Influences of Yb substitution on the intergrain connections and flux pinning properties of Bi-2212 superconductors

Zhang

Hao

et al. 2015

Physica C: Superconductivity and its Applications

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“…In recent years, low‐cost and high‐quality nanostructured materials such as high‐temperature superconducting compounds, high storage materials, ferrites, nanocomposites, ceramics, metallic and semiconductor coatings, thin films, multilayers, and nanoparticles have occupied an important place in a wide variety of industrial, scientific, and technological applications owing to their unique physical, mechanical, electrical, optical, and chemical properties (Ben Salem et al, 2014; Jeevanandam et al, 2018; Saraç et al, 2015a; Saraç & Baykul, 2021a; Slimani et al, 2019; Slimani, Unal, Almessiere, Hannachi, et al, 2020; Slimani, Unal, Almessiere, Korkmaz, et al, 2020; Ullah et al, 2020; Yasin et al, 2020). Various theoretical, experimental, and simulation methods were applied by scientists to study these nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Tuning structural properties, morphology and magnetic characteristics of nanostructuredNi‐Co‐Fe/ITOternary alloys by galvanostatic pretreatment process

Saraç

Trong

Baykul

et al. 2022

Microscopy Res & Technique

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In this research, the structural properties, surface morphology, and magnetic characteristics of nanostructured ternary ferromagnetic alloys grown by a cost‐effective and effortless two‐step electrochemical deposition method on indium tin oxide (ITO) substrates with and without a galvanostatic pretreatment process (GPP) were examined. The GPP was applied at various pretreatment current densities (PCDs) such as −10, −20, and − 30 mA/cm2. The effect of the PCD on the Ni, Co, and Fe contents is found to be insignificant and all resultant Ni‐Co‐Fe thin films show an abnormal co‐deposition. The films have nano‐sized crystallites ranging from 17.3 to 19.6 nm and showed a face‐centered cubic structure with the [111] preferential growth. Compared to the non‐GPP applied Ni‐Co‐Fe film, growing the ternary Ni‐Co‐Fe film on ITO at the PCD of −30 mA/cm2 causes an improvement in the crystal quality and a reduction in the particle size from 150 ± 50 to 70 ± 20 nm. A decrement in the surface roughness and coercivity was also achieved by applying the GPP at the PCD of −30 mA/cm2, but the opposite is true for the GPP performed at the PCD of −10 mA/cm2. The GPP has an effect on the magnetic Squareness Ratio (SQR), but the influence of the PCD on the SQR parameter is negligible. The obtained findings reveal that the properties of the Ni‐Co‐Fe/ITO ternary alloys can be tuned through the GPP applied in various PCDs. Highlights • The effect of the PCD on the Ni, Co, and Fe contents is found to be insignificant. • The films have nano‐sized crystallites and showed a face‐centered cubic structure with the [111] preferential growth. • The analysis reveals that the GPP changes the crystal quality, Hc parameter, surface roughness, and particle size of the films. • The GPP has an effect on the magnetic squareness ratio (SQR), but the influence of the PCD on the SQR parameter is negligible. • The films had nano‐sized crystallites ranging from 17.3 to 19.6 nm. • The films were ferromagnetic, and the Hc and SQR parameters of the films ranged from 30.2 to 42.7 Oe and from 8.8% to 19.6%.

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“…Recently, several groups had studied the scaling behavior for various samples of YBCO grown under different conditions. [8,[11][12][13][14][15][16][17] Slimani et al investigated the flux pinning properties of YBCO added by WO 3 nanoparticles. [18] Also, the impact of Dy 2 O 3 nanoparticles addition on the properties of porous YBCO ceramics is analyzed by Almessiere et al [19] In this investigation, on the one hand, the magnetization measurements have been performed on high-temperature superconductor's single-crystal YBa 2 Cu 3 O 7Àδ at large ranges of temperature T (15À85 K) and in magnetic fields up to 6 T. The temperature dependence of the magnetic penetration depth is estimated from the slope of the linear M(lnH) dependence in the London regime for three directions of the applied magnetic field with the c-axis (θ ¼ 0 , 30 , and 45 ), θ is the angle between the direction of the applied magnetic field and the crystallographic c-axis.…”

mentioning

confidence: 99%

Magnetic Penetration Depth and Coherence Length in a Single‐Crystal YBa₂Cu₃O_7−δ

Hassan

Labrag

Taoufik

et al. 2021

Physica Status Solidi (b)

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At a certain level in the history of superconductivity, it became indispensable to appropriate a microscopic theory that accounts for all the properties that manifest the superconducting materials. In the absence of such a description, we dispose another socalled Ginzburg-Landau (GL) phenomenological theory established in 1950, capable of describing all the properties listed up to now. The basics of this theory rest on the theory of second-order phase transitions founded in 1937 by Lev Landau. The advent of GL theory comes to fill the insufficiency in the London brothers' electrodynamic theory to explain the coexistence of a superconducting phase and a normal phase in a type II superconductor. In addition, it suggests for the first time that the superconducting state is more ordered than the normal state. This is an intuitive thermodynamic theory without a microscopic basis. For this reason, Western scientists did not give it importance. However, the Bardeen-Cooper-Schrieffer theory will come to justify it a posteriori due to the work of Gorkov in 1959 and another version of GL's theory appeared and was called the GLAG theory in honor of these founders Ginzburg, Landau, Abrikosov, and Gorkov. In this new version, the order parameter is directly associated with the Cooper pair wave function. The GL theory is presented in several variants in literature and the intuitive ideas on which they are based seem to be sometimes disconcerting. In contrast, this theory remains very rich because it accounts for the superconductor-normal transition, as well as the thermodynamic, electrodynamic, and quantum effects of the superconducting phase.The theories of V. L. Ginzburg and L. D. Landau highlight two characteristic lengths in the physics of superconductivity [1,2] : 1) The magnetic flux penetration length, known as the London length λ, which defines the length over which magnetic induction can vary in a superconducting material. 2) The coherence length ξ, which represents the spatial dimension of a superconducting pair, i.e., the minimum length over which superconductivity can vary until it disappears. Pairs have reduced dimensions in high-temperature superconductors, where ξ is comparable with the characteristic quantities of the crystal lattice.The quantities λ and ξ diverge for temperatures close to the critical temperature T c . This divergence relates to the weakening of the pairing interaction in the face of thermal agitation and leads to the transition from the superconducting state to the normal state. [3] On the contrary, they allow expressing the critical quantities that delimit the domain of existence of the superconducting state under the effect of an external magnetic field.The variety of behaviors of a superconducting material subjected to an external magnetic field B ¼ μH can be summarized

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SiO2 nanoparticles addition effect on microstructure and pinning properties in YBa2Cu3Oy

Cited by 89 publications

References 39 publications

Influences of Yb substitution on the intergrain connections and flux pinning properties of Bi-2212 superconductors

Influences of Yb substitution on the intergrain connections and flux pinning properties of Bi-2212 superconductors

Tuning structural properties, morphology and magnetic characteristics of nanostructuredNi‐Co‐Fe/ITOternary alloys by galvanostatic pretreatment process

Magnetic Penetration Depth and Coherence Length in a Single‐Crystal YBa₂Cu₃O_7−δ

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SiO2 nanoparticles addition effect on microstructure and pinning properties in YBa2Cu3Oy

Cited by 89 publications

References 39 publications

Influences of Yb substitution on the intergrain connections and flux pinning properties of Bi-2212 superconductors

Influences of Yb substitution on the intergrain connections and flux pinning properties of Bi-2212 superconductors

Tuning structural properties, morphology and magnetic characteristics of nanostructuredNi‐Co‐Fe/ITOternary alloys by galvanostatic pretreatment process

Magnetic Penetration Depth and Coherence Length in a Single‐Crystal YBa2Cu3O7−δ

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Magnetic Penetration Depth and Coherence Length in a Single‐Crystal YBa₂Cu₃O_7−δ