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

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

doi:10.1088/1757-899x/49/1/012042

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…Currently, among the various limitations to be solved during the development of superconducting materials, there are still pendant tasks to overcome such as achieving temporal stability of superconductivity behavior at several experimental conditions [1], getting vortex creep [2], and avoiding the aging effect and environmental degradation [3][4][5][6][7]. In particular, it is well known that the superconductivity property of cuprate superconductors degrades or destroys with time [8].…”

Section: Introductionmentioning

confidence: 99%

Aging and Environmental Effects on the Superconductor $$\left[{{\text{Y}}}_{1\;-\;x}{{\text{Ca}}}_{x}\right]{{\text{SrBaCu}}}_{2.80}{\left({{\text{BO}}}_{3}\right)}_{0.20}{{\text{O}}}_{y}$$ with $$0.10\;\le\;x\;\le\;0.50$$

Bustamante Dominguez,

Sanchez Cornejo,

González

et al. 2024

J Supercond Nov Magn

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The long-term (more than 20 years) aging effect and degradation study of a $$\left[{{\text{Y}}}_{1\;-\;x}{{\text{Ca}}}_{x}\right]{{\text{SrBaCu}}}_{2.80}{\left({{\text{BO}}}_{3}\right)}_{0.20}{{\text{O}}}_{y}$$ Y 1 - x Ca x SrBaCu 2.80 BO 3 0.20 O y powder ceramic superconductors with $$0.10\;\le\;x\;\le\;0.50$$ 0.10 ≤ x ≤ 0.50 are studied by X-ray diffraction and DC Magnetic Property Measurement System (DC-MPMS-SQUID). The samples prepared by solid state reaction were well characterized and stored at normal conditions of pressure and temperature for more than 20 years. The aged samples present the formation of BaCO3 due to the exposure with the environment during that period. The temperature dependence of the magnetization under Hext = 10 Oe reveal that the superconducting state remains in the samples, except for that with x = 0.10, where a higher magnetic field (20 kOe) is required to be applied to observe a superconducting response. Remarkably, the samples show the same TC values despite the aging indicating that the magnetic alignment of the formed BaCO3 affects the magnetic propertied of the whole sample but not the superconducting alignment of the doped YBCO. This is also reflected in the $${\chi }^{-1}({\text{T}})$$ χ - 1 ( T ) plots at normal state, which show both ferromagnetic and antiferromagnetic contribution, in contrast to what was obtained in the pristine samples which only presented antiferromagnetic coupling. From M(H) loops, the critical current density values at 10 K are obtained by using the critical Bean model in order to estimate the transport capabilities of the aged powders.

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Section: Introductionmentioning

confidence: 99%

Aging and Environmental Effects on the Superconductor $$\left[{{\text{Y}}}_{1\;-\;x}{{\text{Ca}}}_{x}\right]{{\text{SrBaCu}}}_{2.80}{\left({{\text{BO}}}_{3}\right)}_{0.20}{{\text{O}}}_{y}$$ with $$0.10\;\le\;x\;\le\;0.50$$

Bustamante Dominguez,

Sanchez Cornejo,

González

et al. 2024

J Supercond Nov Magn

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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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“…After quenching from oxygen annealing temperatures some properties of the RBa 2 Cu 3 O 6+ (Rrare earth element or Y) oxides, in particular, the lattice parameter c and the superconducting transition temperature T c , change for a long time at room temperature (RT) that is known as "room-temperature aging effect" [1][2][3][4]. In papers [1][2][3], 2 these changes in T c are considered to be connected with the formation of oxygen ordering in the basal CuO  planes at RT, at which copper ions are in the square coordination.…”

Section: Introductionmentioning

confidence: 99%

“…According to [1][2][3], this coordination promotes increasing of the concentration of hole charge carriers in the CuO  planes as well as in CuO 2 where superconductivity takes place, Fig. 1, giving rise to growing T c .…”

Section: Introductionmentioning

confidence: 99%

Relationship Between Electronic and Crystal Structure in Nd 1 + x Ba 2 − x Cu 3 O 6 + δ

Фетисов

Эстемирова

2017

J Supercond Nov Magn

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In accordance with a relation between the lattice parameter c and the concentration of holes p, which has been found earlier for the YBa 2 Cu 3 O 6+ compound, we obtain the p parameter in the same manner for the solid solution Nd 1.2 Ba 1.8 Cu 3 O 6+ with substitution of Nd 3+ for Ba 2+ in barium sites. For this, structural and superconducting properties of the Nd 1.2 Ba 1.8 Cu 3 O 6+ samples stored for specified times  after quenching from annealing temperatures have been studied. The investigation shows that Nd 1.2 Ba 1.8 Cu 3 O 6+ stored for a long time has quite a low critical temperature T c extending only to T c onset = 55 K for the most oxidized sample with  = 0.953. We find that the -dependence of the lattice parameter c significantly changes with time . When using the relation between c and p, the existence of electron doping of 0.045 per Cu in Nd 1.2 Ba 1.8 Cu 3 O 6+ can be inferred. This doping explains well reduced T c in Nd 1.2 Ba 1.8 Cu 3 O 6+ . In addition, we observe a local drop of T c by up to 20 K for the samples with p ~ 0.095 ( ~ 0.8) similar to decreasing T c known as "anomaly 1/8".

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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

Cited by 4 publications

References 6 publications

Aging and Environmental Effects on the Superconductor $$\left[{{\text{Y}}}_{1\;-\;x}{{\text{Ca}}}_{x}\right]{{\text{SrBaCu}}}_{2.80}{\left({{\text{BO}}}_{3}\right)}_{0.20}{{\text{O}}}_{y}$$ with $$0.10\;\le\;x\;\le\;0.50$$

Aging and Environmental Effects on the Superconductor $$\left[{{\text{Y}}}_{1\;-\;x}{{\text{Ca}}}_{x}\right]{{\text{SrBaCu}}}_{2.80}{\left({{\text{BO}}}_{3}\right)}_{0.20}{{\text{O}}}_{y}$$ with $$0.10\;\le\;x\;\le\;0.50$$

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

Relationship Between Electronic and Crystal Structure in Nd 1 + x Ba 2 − x Cu 3 O 6 + δ

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