Systematic study of the BaSnO3insertion effect on the properties of YBa2Cu3O7−xfilms prepared by pulsed laser ablation

Mele, P.; Matsumoto, Kaname; Ichinose, Ataru; Mukaida, Masashi; Yoshida, Y.; Horii, Shigeru; Kita, R.

doi:10.1088/0953-2048/21/12/125017

Cited by 80 publications

(54 citation statements)

References 46 publications

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“…The reason for the increases of c-axis length may possibly be Zr substitution for copper atoms in the YBCO structure. The same effect was previously reported for YBCO-BaSnO 3 [9] and ErBCO-BaNb 2 O 6 [10] systems. The behaviour can be explained by ionic radii for coordination number 6, typical for B-position of perovskite structure: Ce …”

Section: Cation Composition Of Films With Bzo and Bco Inclusionssupporting

confidence: 88%

Thin film nanocomposites based on YBCO with defects comprised of self-assembled inclusions

Boytsova

Kaul

Samoilenkov

et al. 2010

J. Phys.: Conf. Ser.

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Thin film nanocomposites based on YBCO with defects comprised of self-assembled inclusions Abstract. The critical current of YBCO superconducting coatings in external magnetic field can be enhanced by incorporating high density of extended nanometer-sized defects to act as pinning centers for magnetic vortexes. One particular variant involves the deposition superconducting film with columnar defects comprised of self-assembled BaZrO 3 , BaSnO 3 or BaHfO 3 nanoinclusions. Here we report the results of our study of YBCO films with different inclusions prepared by MOCVD. For the first time, we succeeded in growth of YBCO films with oriented nanoinclusions of BaCeO 3 phase and demonstrate that it does not reduce T c of YBCO, in contrast to BaZrO 3 or BaSnO 3 . The best composite thin films revealed the T c value of about 88K and critical current density at 77K above 1MA/cm 2 in self-field and around 0.3 MA/cm 2 in 1 T (B//c).

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Section: Cation Composition Of Films With Bzo and Bco Inclusionssupporting

confidence: 88%

Thin film nanocomposites based on YBCO with defects comprised of self-assembled inclusions

Boytsova

Kaul

Samoilenkov

et al. 2010

J. Phys.: Conf. Ser.

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“…Recently there have been many reports indicating that incorporating second-phase nanosized particles such as BaZrO 3 , BaSnO 3 , NbO 2 or defects enhances the pinning force for YBa 2 Cu 3 O 7−δ [10][11][12]. Jongprateep et al had reported that the addition of BaCeO 3 to YBCO results in an enhancement in the critical current density.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Vortex Pinning in YBa2Cu3O7−δ -BaHfO3 Superconductor-Insulator System

Rejith

Vidya

Thomas

et al. 2012

J Supercond Nov Magn

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A systematic study on phase evolution, bulk density, resistivity, critical transition temperature (T C ), critical current density (J C ) and in-field transport critical current density (J C -B) of pure and nano particles of BaHfO 3 added YBa 2 Cu 3 O 7−δ (YBCO) samples of different weight percentages has been carried out. The result shows a significant improvement in the electrical transport properties of the superconductor, namely the J C , J C -B characteristics and flux pinning force (F p ) of the BaHfO 3 added samples. The transition temperature also was found to increase marginally. A maximum transport J C of 742 A/cm 2 at 77 K (for x = 2 wt%) was observed for BaHfO 3 added samples against 147 A/cm 2 for pure YBCO sample. The enhancement of the critical current density in the YBCO-BaHfO 3 sample is attributed to the formation of an insulating and non-reacting YBa 2 HfO 5.5 phase, acting as artificial pinning centers in the matrix. The introduction of nano particles of BaHfO 3 in bulk YBCO increases the pinning force density from 30 × 10 3 N/m 3 to 424 × 10 3 N/m 3 at 77 K. The improvement in sintering density due to an optimum value 2 wt% BaHfO 3 addition in bulk YBCO indicates its potential use in electrical devices and technology. The enhancement in the superconducting properties, particularly in the J C -B characteristics due to BaHfO 3 addition, seems to have great technological significance.

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“…[3][4][5][6][7] High critical current densities are being pursued in REBCO superconducting tapes in high magnetic fields (2-30 T) in a temperature range of 4.2 K-50 K for use of these materials in electric power applications such as motors, generators, superconducting magnetic energy storage (SMES) as well as in high energy particle accelerators, magnetic resonance imaging, and high-field magnets. Introduction of Y 2 BaCuO 5 , 8 BaZrO 3 (BZO), [9][10][11][12][13] BaSnO 3 ,14,15 BaHfO 3 , 16 Ba 2 YNbO 6 , 17,18 and Gd 3 TaO 7 19 nanoscale defects in the REBCO films of the superconducting tapes has been proven to be a powerful method to increase critical current density (J c ) of these tapes via enhanced flux pinning by these defects. Until recently, high J c in REBCO films with BaMO 3 (M ¼ Zr, Sn, and Hf) nanoscale defects has been obtained only with less than 10 mol.…”

mentioning

confidence: 99%

“…Until recently, high J c in REBCO films with BaMO 3 (M ¼ Zr, Sn, and Hf) nanoscale defects has been obtained only with less than 10 mol. % of dopants in films made by pulsed laser deposition (PLD), [9][10][11][14][15][16] metal organic deposition, 12 and metal organic chemical vapor deposition (MOCVD). 13 Such moderately doped REBCO films have been optimized for high J c in low magnetic fields at 77 K and, as such, do not exhibit exemplary performance in conditions of interest for practical applications, i.e., temperatures less than 50 K and fields of 2-30 T. A sharp reduction in the superconducting transition temperature (T c ) in films with high levels of BaMO 3 addition resulted in low J c 15 and hence, heavily doped REBCO films have been generally avoided by most researchers.…”

mentioning

confidence: 99%

High critical currents in heavily doped (Gd,Y)Ba2Cu3Ox superconductor tapes

Selvamanickam

Gharahcheshmeh

et al. 2015

Applied Physics Letters

110

100

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REBa2Cu3Ox ((REBCO), RE = rare earth) superconductor tapes with moderate levels of dopants have been optimized for high critical current density in low magnetic fields at 77 K, but they do not exhibit exemplary performance in conditions of interest for practical applications, i.e., temperatures less than 50 K and fields of 2–30 T. Heavy doping of REBCO tapes has been avoided by researchers thus far due to deterioration in properties. Here, we report achievement of critical current densities (Jc) above 20 MA/cm2 at 30 K, 3 T in heavily doped (25 mol. % Zr-added) (Gd,Y)Ba2Cu3Ox superconductor tapes, which is more than three times higher than the Jc typically obtained in moderately doped tapes. Pinning force levels above 1000 GN/m3 have also been attained at 20 K. A composition map of lift factor in Jc (ratio of Jc at 30 K, 3 T to the Jc at 77 K, 0 T) has been developed which reveals the optimum film composition to obtain lift factors above six, which is thrice the typical value. A highly c-axis aligned BaZrO3 (BZO) nanocolumn defect density of nearly 7 × 1011 cm−2 as well as 2–3 nm sized particles rich in Cu and Zr have been found in the high Jc films.

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Systematic study of the BaSnO₃insertion effect on the properties of YBa₂Cu₃O_7−xfilms prepared by pulsed laser ablation

Cited by 80 publications

References 46 publications

Thin film nanocomposites based on YBCO with defects comprised of self-assembled inclusions

Thin film nanocomposites based on YBCO with defects comprised of self-assembled inclusions

Enhancement of Vortex Pinning in YBa2Cu3O7−δ -BaHfO3 Superconductor-Insulator System

High critical currents in heavily doped (Gd,Y)Ba2Cu3Ox superconductor tapes

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