Effect of Direct Transport Current and Heat Treatment on Resistive Properties of Bismuth-Based Ceramic High-Temperature Superconducting Oxides of Various Compositions

Nikoghosyan, S.K.; Harutunyan, V.V.; Baghdasaryan, V.S.; Mughnetsyan, E.A.; Zargaryan, E.G.; Sarkisyan, A. G.

doi:10.4028/www.scientific.net/ssp.200.267

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…Once the synthesis was completed, the samples were annealed at a temperature of 300 °C for 3 h and cooled slowly in the furnace to room temperature to reach oxygen saturation. The temperature dependence of resistivity (T) was measured by the standard four-probe technique with the bias current 10 mA in the temperature region (77 -300) K [18,19]. Samples have a rectangular cross section (1.8 mm × 1.7 mm), the distance between the potential contacts being 2 mm.…”

Section: Introductionmentioning

confidence: 99%

Superconducting and Electrotransport Properties of Y0.89R0. 11Ba2Cu3O7−δ (R=La, Pr) Polycrystals

Nikoghosyan¹,

Sargsyan²,

Zargaryan³

et al. 2022

AJP

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The superconducting and electrotransport properties were studied in Y0.89R0.11Ba2Cu3O7−δ polycrystals, with the same concentration of rare earth metal elements (R = La, Pr) but with different valence and magnetic moments, by recording the temperature dependence ρ(T) curves of the resistivity in the temperature range (77-300) K. It was considered the influence of La and Pr on the width of the superconducting transition of the samples (ΤC), its critical temperature (determined by the onset of transition - ΤCon and the offset - Tc0), the absolute values of the resistivity of the fluctuation and normal regions ρ(300 K) and ρ(100 K)], as well as on their ratio [a = ρ(300 K)/ρ(100 K)]. It has been revealed that there is a certain correlation between the aforementioned characteristics. It is emphasized that Pr is more critical than La in terms of its effect on characteristics. It is believed that the different behavior of the correlations observed between these characteristics for La and Pr is largely due to the differences in their ionic radii, displayed valence, as well as their intrinsic magnetic moments. It is shown that these differences in the case of La and Pr are manifested in the form of the phase separation phenomenon and the "Pr- anomaly", respectively.

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Section: Introductionmentioning

confidence: 99%

Superconducting and Electrotransport Properties of Y0.89R0. 11Ba2Cu3O7−δ (R=La, Pr) Polycrystals

Nikoghosyan¹,

Sargsyan²,

Zargaryan³

et al. 2022

AJP

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The effect of aging on the superconducting transition temperature and resistivity of Y-Ba-Cu-O ceramics after high temperature treatment

Nikoghosyan

Harutyunyan

Baghdasaryan

et al. 2013

IOP Conf. Ser.: Mater. Sci. Eng.

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Effect of Partial Doping with La Atoms on Some Superconducting and Electrotransport Characteristics of Y1-x LaxBa2Cu3Oy Polycrystals

Nikoghosyan,

Sargsyan,

Zargaryan

et al. 2024

A. J. P.

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The effect of the location with different concentrations of La atoms (x = 0; 0.02; 0.028; 0.11) on some superconducting and electrotransport characteristics of Y1−xLaxBa2Cu3Oy polycrystalline compounds was studied by recording the temperature dependence ρ(T) curves of resistivity in the case of direct current in the range of temperatures (77K - 300K). The temperatures at the onset (Τcon) and offset (Tc0) of the transition, as well as the width of the transition - ΔΤc = Τcon-Tc0, were considered as the superconducting characteristics. The absolute values of ρ(300K) and ρ(100K) and their ratio a = ρ(300K)/ρ(100K) were considered as electric transport characteristics, as well as the temperature coefficient of resistivity dρ/dT, which was determined by ρ(T) in the range of linear dependence with the slope of the curve. From the comparison of these characteristics, it was concluded that there is a certain correlation between the superconducting and electrotransport properties of the studied compounds depending on the concentration x of the partial location of Y atoms with La. Type:

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Effect of Direct Transport Current and Heat Treatment on Resistive Properties of Bismuth-Based Ceramic High-Temperature Superconducting Oxides of Various Compositions

Cited by 3 publications

References 15 publications

Superconducting and Electrotransport Properties of Y0.89R0. 11Ba2Cu3O7−δ (R=La, Pr) Polycrystals

Superconducting and Electrotransport Properties of Y0.89R0. 11Ba2Cu3O7−δ (R=La, Pr) Polycrystals

The effect of aging on the superconducting transition temperature and resistivity of Y-Ba-Cu-O ceramics after high temperature treatment

Effect of Partial Doping with La Atoms on Some Superconducting and Electrotransport Characteristics of Y1-x LaxBa2Cu3Oy Polycrystals

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