Suppression of the order–disorder transition in Ti-doped YBaCuO compounds

Savich, S. V.; Samoylov, A. V.; Kamchatnaya, S. N.; Dobrovolskiy, Oleksandr V.; Вовк, Р. В.; Solovjov, A. L.; Omelchenko, L. V.

doi:10.1007/s10854-017-6936-0

Cited by 3 publications

(2 citation statements)

References 27 publications

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“…Thermally activated flux creep model explains the percolation nature between grains and the broadening behaviour in the low-resistance region near T c0 (ρ=0) (when the pinning force dominates, U ? k B T) [41,42,50], while the flux flow regime appears near the onset transition temperature, where U≈k B T. According to TAFC model, the resistivity data in the broadening tail part can be described by the Arrhenius relation (see below).…”

Section: The Resistivitymentioning

confidence: 99%

The effect of Ni doping on the electrical and magnetic properties of Y_1-xNi_xBa₂Cu₃O_7−δ delta superconductors

Hadi-Sichani

Shakeripour

Salamati

2020

Mater. Res. Express

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The Y 1-x Ni x Ba 2 Cu 3 O 7-δ superconducting samples with low level of Ni concentration were prepared by the standard solid-state reaction. The AC susceptibility, magnetoresistivity, microstructure and the critical current density, J c , of samples as a function of temperature, magnetic field and Ni doping are investigated. The AC susceptibility measurements show that the displacement of the peak temperature T p of the imaginary part of the susceptibility χ″ versus magnetic field was reduced strongly by Ni doping up to an optimum level, which shows the increasing of flux pinning by Ni doping. The J c of samples was derived from AC susceptibility utilizing the Bean model. It shows an increasing in J c by Ni doping, at any temperature or magnetic field, consistent with the results of J c measurements. The magnetoresistance measurements were carried out under magnetic fields up to 1 T and explained by TAFC model. Utilizing this model, the vortex dynamic behaviour and the activation energy U (H) of the compound are investigated. We found that the U (H) increases and the resistive broadening is strongly reduced by Ni doping. The SEM measurements show that the grain sizes are clearly increased and the grain connections are improved by Ni doping. The results of all the observations taken from different measurements are consistent together and indicate the Ni doping has an effective role to improve the intergranular coupling and flux pinning.

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Section: The Resistivitymentioning

confidence: 99%

The effect of Ni doping on the electrical and magnetic properties of Y_1-xNi_xBa₂Cu₃O_7−δ delta superconductors

Hadi-Sichani

Shakeripour

Salamati

2020

Mater. Res. Express

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“…Among these methods, chemical doping is considered to be the most effective way of enhancing Jc, because of the relative simplicity of fabrication, low-cost and flexibility. The literature contains many papers concerning the chemical doping with additions and substitutions of graphene, Ca, Zn, Sr, Ti, La, Al, Gd, Ag, Ce, Co, Fe, Sb, Nb, C, Ni, Yb, Cu, Au, Lu, Pr, Sm and Ba, as examples [13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Impurity effects on activation energy, structure and physical properties of Ybco superconductor

Ozabaci

2021

Commun.Fac.Sci.Univ.Ank.Series A2-A3: Phys.Sci. and Eng.

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The influence of separately added 0.3 wt%, CdO, Bi2O3, BeO and SiO2 on the phase formation, microstructure, magnetic and transport properties of Y1Ba2Cu3O(7-$\delta$) (Y-123 or YBCO) fabricated by conventional solid state reaction method has been analyzed. The results reveal a very low solubility limit for bismuth and silicon in the Y-123 phase, leading to precipitation phases located within intergranular regions. BeO addition suppresses the granular nature of the structure by probably incorporating into the host matrix. CdO does not have a remarkable effect both on structural and superconducting properties of the Y-123 at this doping ratio. Attractive infield transition behavior was obtained in the Bi2O3 added sample with a narrower transition width and an increase of transition temperatures approximately 1 K. The activation energy (U0), a potential energy barrier to prevent flux flow, of the samples was estimated by taking into account Arrhenius law. The best U0 value was computed to be 1.11 eV belonging to the Bi2O3 added sample which implies the contribution of 3-5 µm sized Bi containing precipitation regions on the flux pinning capability of the Y-123.

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Excess conductivity of HTSC ceramics YBa2Cu3O7–δ with TiO2 impurities

Savich

Samojlov

Kurbanov

et al. 2022

Low Temperature Physics

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In this work, the conductivity of YBa2Cu3O7−δ ceramics doped with Ti was studied. It is shown that the introduction of the TiO2 impurity leads to an increase in the number of effective scattering centers for normal carriers. The excess conductivity of the studied samples in a wide temperature range obeys an exponential temperature dependence, and near Tc it is satisfactorily described by the Aslamazov–Larkin theoretical model. In this case, the addition of Ti leads to a significant expansion of the temperature interval for the existence of excess conductivity in the ab plane.

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Suppression of the order–disorder transition in Ti-doped YBaCuO compounds

Cited by 3 publications

References 27 publications

The effect of Ni doping on the electrical and magnetic properties of Y_1-xNi_xBa₂Cu₃O_7−δ delta superconductors

The effect of Ni doping on the electrical and magnetic properties of Y_1-xNi_xBa₂Cu₃O_7−δ delta superconductors

Impurity effects on activation energy, structure and physical properties of Ybco superconductor

Excess conductivity of HTSC ceramics YBa2Cu3O7–δ with TiO2 impurities

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Suppression of the order–disorder transition in Ti-doped YBaCuO compounds

Cited by 3 publications

References 27 publications

The effect of Ni doping on the electrical and magnetic properties of Y1-xNixBa2Cu3O7−δ delta superconductors

The effect of Ni doping on the electrical and magnetic properties of Y1-xNixBa2Cu3O7−δ delta superconductors

Impurity effects on activation energy, structure and physical properties of Ybco superconductor

Excess conductivity of HTSC ceramics YBa2Cu3O7–δ with TiO2 impurities

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Product

Resources

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The effect of Ni doping on the electrical and magnetic properties of Y_1-xNi_xBa₂Cu₃O_7−δ delta superconductors

The effect of Ni doping on the electrical and magnetic properties of Y_1-xNi_xBa₂Cu₃O_7−δ delta superconductors