Effect of Sm-substitution on the electrical and magnetic properties of (Tl0.8Hg0.2)-1223

Abou‐Aly, A. I.; Awad, R.; Ibrahim, I. H.; Abdeen, W.

doi:10.1016/j.jallcom.2009.02.156

Cited by 14 publications

(9 citation statements)

References 33 publications

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“…All the samples show metallic-like behavior above T c and exhibit a transition to the superconducting state below T c . A small curvature above the superconducting transition temperature T c is observed, for all the prepared samples, which is a characteristic of superconducting thermodynamic fluctuations [43]. Generally, T c is determined from Table 3.…”

Section: Resultsmentioning

confidence: 87%

Ion Beam Analysis and Electrical Resistivity Studies of (Cu0.5Tl0.5)-1223 Phase with Added Nano-oxides

Mohammed

Awad

Abou‐Aly

et al. 2012

J Supercond Nov Magn

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In this study, superconducting samples of type Cu 0.5 Tl 0.5 Ba 2 Ca 2 Cu 3 O 10−δ added by SnO 2 and In 2 O 3 in nano-scale were prepared by a solid-state reaction technique. The concentrations of both SnO 2 and In 2 O 3 were 0.0, 0.1, 0.2, 0.4, 0.6 and 1.0 wt% of the sample's total mass. The prepared samples were characterized using X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) for phase analysis and microstructure examination. The elemental content of the prepared samples was determined using energy dispersive X-ray (EDX) and particle induced X-ray emission (PIXE). The results of elemental content, determined from EDX and PIXE, were compared and discussed. In addition, The oxygen content of these samples was obtained using non Rutherford backscattering spectroscopy (RBS) at 3 MeV proton beam. It was found that the Oxygen-content of (Cu 0.5 Tl 0.5 )-1223 phase was not affected by both SnO 2 and In 2 O 3 nano-oxides addition. The electrical resistivity of the prepared samples was measured by the conventional four-probe technique from room temperature down to the zero superconducting transition temperature (T 0 ). An increase in the superconducting transition temperature T c from 106 to 119 K was observed as x was varied from 0.0 to 0.6 wt% for (SnO 2 ) x Cu 0.5 Tl 0.5 Ba 2 Ca 2 Cu 3 O 10−δ , followed by a systematic decrease with increasing nano-SnO 2 addition. On the other hand, the T c values for (In 2 O 3 ) x Cu 0.5 Tl 0.5 Ba 2 Ca 2 Cu 3 O 10−δ show a small variation with x. Moreover, the variation rate of T c with x, for both nano-additions, was found to be directly proportional to the variation of the volume fraction of the prepared samples.

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Section: Resultsmentioning

confidence: 87%

Ion Beam Analysis and Electrical Resistivity Studies of (Cu0.5Tl0.5)-1223 Phase with Added Nano-oxides

Mohammed

Awad

Abou‐Aly

et al. 2012

J Supercond Nov Magn

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“…It reflects the spin charge separation in CuO 2 -planes that results in the longitudinal transport relaxation rate 1/τ ~ T [32]. A small curvature in the electrical resistivity appears above the superconducting transition temperature that characterizes the superconducting Cooper-pairs fluctuations [33] or the opening of the spin-gap in high-temperature superconductivity [34] [35] due to magnetic impurities. The electrical resistivity data of the prepared samples are well fitted, in the temperature range from 300 K down to 2 T c , according to equation:…”

Section: Resultsmentioning

confidence: 99%

Ion Beam Analysis and Electric Properties of GdBa2Cu3O7-δ Added with Nanosized Ferrites ZnFe2O4 and CoFe2O4

Basma¹,

Roumié²,

Awad³

et al. 2015

MSA

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In this study, superconducting samples of type GdBa2Cu3O7−δ added with x wt% (0 ≤ x ≤ 0.4) nanoferrites ZnFe2O4 and CoFe2O4 were prepared by the conventional solid-state reaction technique. The prepared samples were characterized using X-ray powder diffraction (XRD) in order to determine the volume fraction and lattice parameters. The elemental contents of the prepared samples were determined using particle induced X-ray emission (PIXE). In addition, the oxygen-content of these samples was obtained using non-Rutherford backscattering spectroscopy (RBS) at 3 MeV proton beam. It is found that the Oxygen-content of GdBa2Cu3O7−δ phase remains practically constant for low additions of both nanoferrites but it increases with high additions. The electrical resistivity of the prepared samples was measured by the conventional four-probe technique from room temperature down to the zero superconducting transition temperature (T0). An increase in the superconducting transition temperature Tc and the critical current density Jc is observed as x varies from 0.0 to 0.06 wt% of (ZnFe2O4)xGdBa2Cu3O7−δ, followed by a systematic decrease with increasing x. On the other hand, the Tc values for (CoFe2O4)xGdBa2Cu3O7−δ show a systematic decrease with x for both high and low additions while Jc is enhanced up to x = 0.01 wt% and decrease with further increase in x.

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Section: Introductionmentioning

confidence: 99%

“…Rare-earth (RE) replacements at the Ca site enhanced the superconducting characteristics for low substitution concentration and degraded superconductivity for greater substitution content [12]. Research has extensively examined the superconducting characteristics of numerous high-temperature superconducting phases substituted by Sm 3+ and La 3+ ions [12][13][14]. Sm substitution in Tl 0.8 Hg 0.2 Ba 2 Ca 2−x Sm x Cu 3 O 9−δ reduced the phase transition temperature while increasing the inter-grain critical density until x = 0.05 and then decreased it [12].…”

Section: Introductionmentioning

confidence: 99%

“…Research has extensively examined the superconducting characteristics of numerous high-temperature superconducting phases substituted by Sm 3+ and La 3+ ions [12][13][14]. Sm substitution in Tl 0.8 Hg 0.2 Ba 2 Ca 2−x Sm x Cu 3 O 9−δ reduced the phase transition temperature while increasing the inter-grain critical density until x = 0.05 and then decreased it [12]. Samarium (Sm) substitution improved both J c and T c in the (Bi, Pb)-2212 phase [13].…”

Section: Introductionmentioning

confidence: 99%

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Superconducting and Mechanical Properties of the Tl0.8Hg0.2Ba2Ca2Cu3O9−δ Superconductor Phase Substituted by Lanthanum and Samarium Fluorides

Khattar,

Anas,

Awad

et al. 2023

Condensed Matter

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This study investigated the impact of samarium and lanthanum fluorides (SmF3 and LaF3) on the physical and mechanical properties of Tl0.8Hg0.2Ba2Ca2−xRxCu3O9−δ−yFy superconducting phases (specifically the (Tl, Hg)-1223 phase), where R = Sm and La, with 0.00 ≤ x ≤ 0.10. The superconducting samples were synthesized using the solid-state reaction method. X-ray diffraction (XRD) verified the formation of the (Tl, Hg)-1223 phase without altering its tetragonal structure. Scanning electron micrographs (SEM) reveal the improvement of the grain size and inter-grain connectivity as Sm and La contents increased up to x=0.025. The electrical properties of (Tl, Hg)-1223 were studied using I-V and electrical resistivity measurements. Improved superconducting transition temperature (Tc) and transport critical current density (Jc) were observed up to x=0.025, beyond which they decreased substantially. Vickers microhardness (Hv) measurements were performed at room temperature to investigate their mechanical performance with various applied loads (0.49–9.80 N) and times (10–90 s). For both substitutions, the mechanical properties were enhanced up to an optimal value at x=0.025. All samples exhibited normal indentation size effect (ISE) behavior. The proportional sample resistance (PSR) model best explained Hv values among five theoretical models. Dislocation creep was the primary creep mechanism in the samples, according to indentation creep studies.

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Effect of Sm-substitution on the electrical and magnetic properties of (Tl0.8Hg0.2)-1223

Cited by 14 publications

References 33 publications

Ion Beam Analysis and Electrical Resistivity Studies of (Cu0.5Tl0.5)-1223 Phase with Added Nano-oxides

Ion Beam Analysis and Electrical Resistivity Studies of (Cu0.5Tl0.5)-1223 Phase with Added Nano-oxides

Ion Beam Analysis and Electric Properties of GdBa<SUB>2</SUB>Cu<SUB>3</SUB>O<SUB>7-δ</SUB> Added with Nanosized Ferrites ZnFe<SUB>2</SUB>O<SUB>4</SUB> and CoFe<SUB>2</SUB>O<SUB>4</SUB>

Superconducting and Mechanical Properties of the Tl0.8Hg0.2Ba2Ca2Cu3O9−δ Superconductor Phase Substituted by Lanthanum and Samarium Fluorides

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Effect of Sm-substitution on the electrical and magnetic properties of (Tl0.8Hg0.2)-1223

Cited by 14 publications

References 33 publications

Ion Beam Analysis and Electrical Resistivity Studies of (Cu0.5Tl0.5)-1223 Phase with Added Nano-oxides

Ion Beam Analysis and Electrical Resistivity Studies of (Cu0.5Tl0.5)-1223 Phase with Added Nano-oxides

Ion Beam Analysis and Electric Properties of GdBa&lt;SUB&gt;2&lt;/SUB&gt;Cu&lt;SUB&gt;3&lt;/SUB&gt;O&lt;SUB&gt;7-δ&lt;/SUB&gt; Added with Nanosized Ferrites ZnFe&lt;SUB&gt;2&lt;/SUB&gt;O&lt;SUB&gt;4&lt;/SUB&gt; and CoFe&lt;SUB&gt;2&lt;/SUB&gt;O&lt;SUB&gt;4&lt;/SUB&gt;

Superconducting and Mechanical Properties of the Tl0.8Hg0.2Ba2Ca2Cu3O9−δ Superconductor Phase Substituted by Lanthanum and Samarium Fluorides

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Ion Beam Analysis and Electric Properties of GdBa<SUB>2</SUB>Cu<SUB>3</SUB>O<SUB>7-δ</SUB> Added with Nanosized Ferrites ZnFe<SUB>2</SUB>O<SUB>4</SUB> and CoFe<SUB>2</SUB>O<SUB>4</SUB>