1992
DOI: 10.1016/0011-2275(92)90002-r
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Flux pinning by non-superconducting inclusions in melt-processed YBaCuO superconductorrs

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Cited by 135 publications
(73 citation statements)
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“…This is easily seen in FIGURE 3 where all the elements increase in atomic % with increasing size, or increasing W atomic % except Cu, which instead decreases. It is widely observed in melt-textured YBCO superconductor that large deposits (up to several hundred micrometers in size) of a compound rich in Ba and Cu is a byproduct of the texturing process, e.g., [1][2][3][4][5][6][8][9]. A similar analysis (not shown) of the (W +Pt)-doped samples also concluded that Cu is not a component of the W-Pt-Y-Ba-O particles.…”
Section: Microstructurementioning
confidence: 67%
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“…This is easily seen in FIGURE 3 where all the elements increase in atomic % with increasing size, or increasing W atomic % except Cu, which instead decreases. It is widely observed in melt-textured YBCO superconductor that large deposits (up to several hundred micrometers in size) of a compound rich in Ba and Cu is a byproduct of the texturing process, e.g., [1][2][3][4][5][6][8][9]. A similar analysis (not shown) of the (W +Pt)-doped samples also concluded that Cu is not a component of the W-Pt-Y-Ba-O particles.…”
Section: Microstructurementioning
confidence: 67%
“…For example, when Y 2 BaCuO 5 (Y211) is admixed into the YBa 2 Cu 3 O 7-δ (YBCO or Y123) powders and melt-textured, profuse deposits of Y211 remain after texturing. Y211 deposits have been shown to act as pinning centers and increase J C in melt-textured YBCO [1]. Platinum (Pt) [2] or nanometer-size cerium oxide (nano-CeO 2 ) [3] doping into Y123 and Y211 powders, followed by melttexturing, results in Y211 deposits that are reduced in size, and are also elongated in shape.…”
Section: Introductionmentioning
confidence: 99%
“…Microstructure analysis, performed by polarized light microscope, revealed that Sm-123 addition leads to a higher amount of slightly coarser Y-211 particles (Fig. 4), which is related to lower critical current densities (J c (0 T, 77 K) ≈ 6 × 10 4 A/cm 2 ) of the YBCO samples with Sm-123 addition in low magnetic fields when compared to YBCO sample without any addition (J c (0 T, 77 K) = 6.6 × 10 4 A/cm 2 ) [6]. On the other hand, an enhancement of critical current density, J c , in higher magnetic fields was observed for Y123-Sm, x = 0.001, 0.0025, 0.05 samples.…”
Section: Resultsmentioning
confidence: 98%
“…Additionally, an enhancement of the critical current density, J c , can be reached by controlling the size, volume fraction, and distribution of secondary phase particles, very often Y 2 BaCuO 5 (Y-211) [6] or Y 2 Ba 4 CuMO z (Y-2411, M = Nb, Ta, Mo, W, and others) [7]. Besides, it is possible to introduce the additional pinning centers for example by irradiation [8] …”
Section: Introductionmentioning
confidence: 99%
“…The important microstructural component of YBCO bulk single-grain superconductors are small Y-211 particles trapped in to YBCO matrix [1]. It is well known, that addition of Pt or Ce can eectively rene Y-211 particles [2].…”
Section: Introductionmentioning
confidence: 99%