Oxygen stoichiometry and structural parameters of Sm1+Ba2−Cu3O  solid solutions versus composition and temperature

Drozd, Vadym; Baginski, I.L.; Nedil'ko, S. A.; Mel'nikov, V. S.

doi:10.1016/j.jallcom.2004.03.125

Cited by 9 publications

(6 citation statements)

References 35 publications

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“…However, the a -axis oriented growth was not strongly affected by the substitution since the minimum diffusion distance remained the same from one up layer to the lower layer. It was reported that with the increase of x in the Sm 1+ x Ba 2− x Cu 3 O 7−δ solid solution, the lattice parameter of c -axis rapidly reduces, whereas that of a -axis shows only a little change . Thus, the minimum jump length for both Sm 3+ and Ba 2+ required for c -axis growth of SmBCO is reduced.…”

Section: Resultsmentioning

confidence: 98%

Crystallographic Axis Transition of Sm_1+xBa_2−xCu₃O_7−δ Film Prepared by Liquid Phase Epitaxy (LPE)

Tang

Cai

et al. 2009

Crystal Growth & Design

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The effect of two significant factors, flux composition and growth atmosphere, on the crystallographic axis orientation of the Sm1+x Ba2−x Cu3O7−δ “SmBCO” film was studied. We succeeded in achieving a pure a-axis SmBCO LPE film by applying Cu-rich Ba−Cu−O flux (Ba/Cu ratio 3:7) and 1 atm oxygen atmosphere. Compared to YBCO, it is more difficult to grow SmBCO along a-axis. Several possible reasons were considered, especially the mutual substitution of Sm3+ and Ba2+, which may prefer c-axis growth. Significant features of the LPE process, like nucleation, supersaturation, and growth rate, manifest tendency to prevent a-axis growth.

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Section: Resultsmentioning

confidence: 98%

Crystallographic Axis Transition of Sm_1+xBa_2−xCu₃O_7−δ Film Prepared by Liquid Phase Epitaxy (LPE)

Tang

Cai

et al. 2009

Crystal Growth & Design

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“…Meanwhile, this substitution effect has little influence on the a -axis oriented growth, since the minimum migration distance is not altered. Additionally, the substitution effect in the solid solution would result in an evident decrease in the c -axis lattice parameter and a minor change in the lattice parameter of the a -axis, which shortens the minimum jump distance during the growth of the c -phase and narrows down the a -film growth window in the SmBCO system. Secondly, it was reported that as the RE3+ size increases, the interfacial energy of the REBCO in BCO solution decreases .…”

Section: Formation Of A- C-axis Oriented Films and Their Growth Kineticsmentioning

confidence: 99%

The Orientation Transition and Control of REBaCu₃O_y Films Grown by Liquid Phase Epitaxy

Huang

Yao

2021

Crystal Growth & Design

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Liquid phase epitaxy (LPE)-processed REBa2Cu3O7‑δ films, which possess single-crystalline properties, are of great significance to fundamental superconductor studies and practical applications. Performances of these films are related to their crystallographic orientations due to the notable anisotropy of coherent length along the a (and/or b) axis and c axis. Recently, an increasing number of experimental outcomes have proven that this preferential orientation is strongly dependent on the growth conditions. Based on those systematic results, the origin of crystallographic orientations is satisfactorily understood. Furthermore, attention has been directed toward tuning supersaturation for oriented film control, such as the pure a-axis oriented film (a-film), the pure c-axis oriented film (c-film), and some distinctive composite structures with superior performance for device applications. In order to provide universal guidance for artificial microstructure manipulation in LPE and significant insights for the development of film preparation, the mechanism of the a-/c-film formation related to thermodynamic and kinetic factors as well as the oriented growth control have been discussed in this review. Furthermore, the whole evolution model of oriented structures is also established, which may help researchers to better understand the films growth mechanism. Finally, the current challenges and future outlook on this flourishing topic have been suggested.

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“…For these purposes, some researchers have attempted to synthesize superconductors by various processing methods and introducing various dopants. The RE-123 samples preparations using the sol-gel method [4], by the melt-textured growth [5], by infiltration-growth technique [6], and by top-seeded melt-growth (TSMG) [7] have so far been reported. Further, microstructure in conjunction with superconducting properties with various doping have also been investigated [8,9].…”

Section: Introductionmentioning

confidence: 99%

Structural and superconducting aspects in REBa[sub 2]Cu[sub 3]O[sub 7−δ] (RE = Nd, Gd, Eu) superconductors prepared by wet-mixing method and varying sintering temperature

Suharta¹,

Suasmoro²,

Pratapa³

et al. 2013

AIP Conference Proceedings

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The rare-earth copper oxide superconductors of Nd 1 Ba 2 Cu 3 O 7-G , Nd 0.5 Gd 0.5 Ba 2 Cu 3 O 7-G and Nd 0.33 Eu 0.33 Gd 0.33 Ba 2 Cu 3 O 7-G have successfully been synthesized by introducing a wet-mixing method. Sintering was carried out at varying temperatures of 920, 940, 960 and 970 o C for 10 hours in air. The effects of sintering temperature on the structural and crystallinity of the synthesized powders was studied using X-ray diffraction techniques. Rietveld analyses gave clearly separated diffraction (013) and (110) peaks at respectively 32.2 o and 32.5 o , decreasing Goodness-of-Fit, increasing average crystal size and increasing orthorhombicity with increasing sintering temperature from 920 to 970 o C. In this research, the superconducting critical temperatures of Nd 0.5 Gd 0.5 Ba 2 Cu 3 O 7-G and Nd 0.33 Eu 0.33 Gd 0.33 Ba 2 Cu 3 O 7-G powders sintered at 970 o C and measured using a SQUID magnetometer was obtained to be about 88-91 K.

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Oxygen stoichiometry and structural parameters of Sm1+Ba2−Cu3O solid solutions versus composition and temperature

Cited by 9 publications

References 35 publications

Crystallographic Axis Transition of Sm_1+xBa_2−xCu₃O_7−δ Film Prepared by Liquid Phase Epitaxy (LPE)

Crystallographic Axis Transition of Sm_1+xBa_2−xCu₃O_7−δ Film Prepared by Liquid Phase Epitaxy (LPE)

The Orientation Transition and Control of REBaCu₃O_y Films Grown by Liquid Phase Epitaxy

Structural and superconducting aspects in REBa[sub 2]Cu[sub 3]O[sub 7−δ] (RE = Nd, Gd, Eu) superconductors prepared by wet-mixing method and varying sintering temperature

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Oxygen stoichiometry and structural parameters of Sm1+Ba2−Cu3O solid solutions versus composition and temperature

Cited by 9 publications

References 35 publications

Crystallographic Axis Transition of Sm1+xBa2−xCu3O7−δ Film Prepared by Liquid Phase Epitaxy (LPE)

Crystallographic Axis Transition of Sm1+xBa2−xCu3O7−δ Film Prepared by Liquid Phase Epitaxy (LPE)

The Orientation Transition and Control of REBaCu3Oy Films Grown by Liquid Phase Epitaxy

Structural and superconducting aspects in REBa[sub 2]Cu[sub 3]O[sub 7−δ] (RE = Nd, Gd, Eu) superconductors prepared by wet-mixing method and varying sintering temperature

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Product

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Crystallographic Axis Transition of Sm_1+xBa_2−xCu₃O_7−δ Film Prepared by Liquid Phase Epitaxy (LPE)

Crystallographic Axis Transition of Sm_1+xBa_2−xCu₃O_7−δ Film Prepared by Liquid Phase Epitaxy (LPE)

The Orientation Transition and Control of REBaCu₃O_y Films Grown by Liquid Phase Epitaxy