Impact of Dy2O3 nanoparticles additions on the properties of porous YBCO ceramics

Almessiere, M.A.; Slimani, Y.; Hannachi, E.; Algarni, R.; Azzouz, F. Ben

doi:10.1007/s10854-019-02106-1

Cited by 32 publications

(6 citation statements)

References 36 publications

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“…[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. On the other hand, we examine the electrical resistivity as a function of temperature in thin film of single-crystal YBa 2 Cu 3 O 7Àδ , around superconducting transition region under various values of the magnetic field up to 14 T in directions B∥c and B⊥c-axis to determine in a different magnetic field the upper critical field B c2 using 90% criteria of the normal-state resistivity value from ρ(T) curves in the two directions of the magnetic field.…”

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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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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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“…The strength of bases strongly influences the rate of reaction. NaOH has ionic bonding whereas NH 4 OH has covalent bonding due to which the reaction rate with other ions could be different [5]. It may lead to different growth and crystallization rates, which could affect the various properties of the synthesized material.…”

Section: Introductionmentioning

confidence: 99%

“…Ferrites, especially Cs ferrite and Co ferrite, have promising applications in various fields of magnetics, electronics, and biomedical sciences [5]. Alteration and controlling magnetic properties is regarded as a great challenge aim for most researchers in the field of magnetic materials.…”

Section: Introductionmentioning

confidence: 99%

INVESTIGATION THE MAGNETIC PROPERTIES OF CsyCo1-0.5yFe2O4 NANOPARTICLES AT LOW MOLAR RATIO VARIATION

Tareq

2023

Eurasian phys. tech. j.

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The effect of substitution ferrite by previously not used elements to control magnetic properties is of great interest to researchers. This study illustrates the effect of low substitution of Cs, with molar ratios of y of 0.0, 0.05, 0.15, and 0.25 on the structural and magnetic properties of CsyCo1-0.5yFe2O4nanoparticles. The synthesizing method was the co-precipitation method. The metal chlorides were used to perform the reaction in the distilled water using NaOH to reach a pH of 10. The X-ray diffraction, Field Emission Scanning Electron Microscopy, Electron Dispersive X-ray and Vibrating Sample Magnetometry analyses were conducted for all samples. All samples had the patternsof the spinel structure coincide to a high degree with the Co ferrite pattern. There was a general increase in the lattice constant with the increase in the Cs content, while the crystallite size decreased from about 18 to 12.2 nm as the molar ratio increased from 0 to 0.25. The Electron Microscopy investigation showed that all samples owing spherical nanoparticles with no other shapes. The average particle sizes were between 40 to 60nm, which increased Cs1+content. The magnetic parameters mainly showed a relatively high coercivity (wide loops) and a decrease in magnetization saturation (down to 50.43emu/g), crystalline anisotropic constant, and thesquareness ratio

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“…The flux pinning enhancement can be optimised when the inclusion of nano-sized particles is in the range of the superconducting coherence length of YBCO (2-4 nm) [6]. A significant growth in terms of improvement of the interconnectivity and the flux pinning has been reported by adding various impurities to YBCO, e.g., Y 2 O 3 , DY 2 O 3 , CO, WO 3 , and AL 2 O 3 [7][8][9][10][11]. These metal oxides can act as artificial pinning centres for high critical current density.…”

Section: Introductionmentioning

confidence: 99%

Orthorhombic YBa2Cu3O7−δ Superconductor with TiO2 Nanoparticle Addition: Crystal Structure, Electric Resistivity, and AC Susceptibility

Barood,

Kechik,

Tee

et al. 2023

Coatings

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This article reports the effect of a nanoscale addition of TiO2 on the structure and superconducting parameters of the high-temperature superconductor YBa2Cu3O7-δ (Y123). Polycrystalline compounds of Y123 with different percentages of TiO2, x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0, were fabricated using the thermal treatment method. An analysis using X-ray diffraction confirmed the formation of Y123 phases for all composite samples. Field-emission scanning electron microscopy (FESEM) analysis revealed the growth of grain size and decrease in porosity, with a sign of partial melting of grains for the samples with TiO2 addition. The magnetic and electric transport properties were investigated using AC susceptibility measurement and the four-probe method, respectively. It was observed that the superconducting transition temperature, Tc-onset, for a pure sample determined by ACS and 4PP was 95.6 K and 95.4 K, respectively. These values were found to decrease with the addition of TiO2, while the superconducting transition (∆Tc) improved with TiO2 addition except for the sample at x = 0.2 wt.%, which showed the broadest transition width. The sharpest superconducting transition (∆Tc) was observed for the sample at x = 1.0 wt.%, indicating that the addition of TiO2 nanoparticles is expected to serve as artificial pinning centres and strengthen the connection among the grains in the Y123 ceramic.

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Impact of Dy2O3 nanoparticles additions on the properties of porous YBCO ceramics

Cited by 32 publications

References 36 publications

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

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

INVESTIGATION THE MAGNETIC PROPERTIES OF CsyCo1-0.5yFe2O4 NANOPARTICLES AT LOW MOLAR RATIO VARIATION

Orthorhombic YBa2Cu3O7−δ Superconductor with TiO2 Nanoparticle Addition: Crystal Structure, Electric Resistivity, and AC Susceptibility

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Impact of Dy2O3 nanoparticles additions on the properties of porous YBCO ceramics

Cited by 32 publications

References 36 publications

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

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

INVESTIGATION THE MAGNETIC PROPERTIES OF CsyCo1-0.5yFe2O4 NANOPARTICLES AT LOW MOLAR RATIO VARIATION

Orthorhombic YBa2Cu3O7−δ Superconductor with TiO2 Nanoparticle Addition: Crystal Structure, Electric Resistivity, and AC Susceptibility

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Product

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

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