Systematic study of BaSnO3 doped YBa2Cu3O7−x films

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

doi:10.1016/j.physc.2009.05.080

Cited by 38 publications

(21 citation statements)

References 23 publications

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“…5a reveals a non-power law behavior in the case of the BZO-doped YBCO film. This feature has been previously observed in doped YBCO films, in which the nanoparticles are distributed homogeneously within the YBCO matrix [28], as opposed to a columnar particle growth [29]. From X-ray diffraction and TEM analysis of the YBCO-10 mol % BZO, we may see that the non-power law behavior of J c is to be expected in this sample.…”

Section: Transport Propertiessupporting

confidence: 77%

The Vortex Path Model Analysis of the Field Angle Dependence of the Critical Current Density in Nanocomposite YBa2Cu3 O 7−x – BaZrO3 Films Obtained by Low Fluorine Chemical Solution Deposition

Mos

Nasui

Gabor

et al. 2014

J Supercond Nov Magn

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In the present paper, we analyze the role of in situ grown BaZrO3 (BZO) inclusions in YBa2Cu3O7−x (YBCO) thin films prepared by chemical solution deposition using a low fluorine coating solution, on the field angle dependence of the critical current density, Jc(), data using the vortex path model. In order to form a coherent picture on the BZO doping influence on the pinning properties of the YBCO matrix, detailed structural analyses performed by X-ray diffraction techniques and microstructural evaluation by transmission electron microscopy are also presented. The evaluation of different contributions to the overall, Jc, permitted us to prove the effectiveness of the BZO inclusions acting as isotropic pinning centers, reflected in a uniform component of high relative value with respect to other components. For the studied 10 mol % BZO doping concentration, a threefold increase in the critical current density, Jc, of the YBCO host is measured, in self-field at 77 K, corresponding to a value of Jc=2.9MA/cm2, whereas a factor 10 is measured at 1 T (Jc=0.35 MA/cm2). © 2014, Springer Science+Business Media New York

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Section: Transport Propertiessupporting

confidence: 77%

The Vortex Path Model Analysis of the Field Angle Dependence of the Critical Current Density in Nanocomposite YBa2Cu3 O 7−x – BaZrO3 Films Obtained by Low Fluorine Chemical Solution Deposition

Mos

Nasui

Gabor

et al. 2014

J Supercond Nov Magn

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“…The anisotropic nature of YBCO and its effects on J c (H, Θ, T) further complicate this process by requiring optimization of pinning defects for different orientations of applied field [11]. Significant effort has been spent to introduce nanoscale pinning structures in materials such as YBCO and REBCO though the incorporation of second phase materials such as BaZrO 3 [12,13,14], BaSnO 3 [15], Y 2 O 3 [16] Y 2 BaCuO 5 (Y-211) [17] or rare-earth tantalates [18] to the YBCO source material to induce second phase growth. Efforts are made to maximize self-field J c , while maintaining the highest possible minimum J c for any applied field orientation (Θ) [14].…”

Section: Introductionmentioning

confidence: 99%

Nanorod Self-Assembly in High Jc YBa2Cu3O7−x Films with Ru-Based Double Perovskites

Holesinger¹,

Feldmann²,

Maiorov³

et al. 2011

Materials

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Many second phase additions to YBa2Cu3O7−x (YBCO) films, in particular those that self-assemble into aligned nanorod and nanoparticle structures, enhance performance in self and applied fields. Of particular interest for additions are Ba-containing perovskites that are compatible with YBCO. In this report, we discuss the addition of Ba2YRuO6 to bulk and thick-film YBCO. Sub-micron, randomly oriented particles of this phase were found to form around grain boundaries and within YBCO grains in bulk sintered pellets. Within the limits of EDS, no Ru substitution into the YBCO was observed. Thick YBCO films were grown by pulsed laser deposition from a target consisting of YBa2Cu3Oy with 5 and 2.5 mole percent additions of Ba2YRuO6 and Y2O3, respectively. Films with enhanced in-field performance contained aligned, self-assembled Ba2YRuO6 nanorods and strained Y2O3 nanoparticle layers. A 0.9 µm thick film was found to have a self-field critical current density (Jc) of 5.1 MA/cm2 with minimum Jc(Θ, H=1T) of 0.75 MA/cm2. Conversely, Jc characteristics were similar to YBCO films without additions when these secondary phases formed as large, disordered phases within the film. A 2.3 µm thick film with such a distribution of secondary phases was found to have reduced self-field Jc values of 3.4 MA/cm2 at 75.5 K and Jc(min, Θ, 1T) of 0.4 MA/cm2.

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“…The number density of defects in the REBCO matrix can be increased by increasing the BMO doping level, [15][16][17][18] lowering the growth temperature during deposition, 3,18,19 and using the optimal type of BMO materials. 6 In order to apply REBCO CCs to coil-based applications, isotropic improvement of their J c performance (under a magnetic field) at the operating conditions is required.…”

mentioning

confidence: 99%

Improvement in Jc performance below liquid nitrogen temperature for SmBa2Cu3Oy superconducting films with BaHfO3 nano-rods controlled by low-temperature growth

et al. 2016

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For use in high-magnetic-field coil-based applications, the critical current density (Jc) of REBa2Cu3Oy (REBCO, where RE = rare earth) coated conductors must be isotropically improved, with respect to the direction of the magnetic field; these improvements must be realized at the operating conditions of these applications. In this study, improvement of the Jc for various applied directions of magnetic field was achieved by controlling the morphology of the BaHfO3 (BHO) nano-rods in a SmBCO film. We fabricated the 3.0 vol. % BHO-doped SmBCO film at a low growth temperature of 720 °C, by using a seed layer technique (Ts = 720 °C film). The low-temperature growth resulted in a morphological change in the BHO nano-rods. In fact, a high number density of (3.1 ± 0.1) × 103 μm−2 of small (diameter: 4 ± 1 nm), discontinuous nano-rods that grew in various directions, was obtained. In Jc measurements, the Jc of the Ts = 720 °C film in all directions of the applied magnetic field was higher than that of the non-doped SmBCO film. The Jcmin (6.4 MA/cm2) of the former was more than 6 times higher than that (1.0 MA/cm2) of the latter at 40 K, under 3 T. The aforementioned results indicated that the discontinuous BHO nano-rods, which occurred with a high number density, exerted a 3D-like flux pinning at the measurement conditions considered. Moreover, at 4.2 K and under 17 T, a flux pinning force density of 1.6 TN/m3 was realized; this value was comparable to the highest value recorded, to date.

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Systematic study of BaSnO3 doped YBa2Cu3O7−x films

Cited by 38 publications

References 23 publications

The Vortex Path Model Analysis of the Field Angle Dependence of the Critical Current Density in Nanocomposite YBa2Cu3 O 7−x – BaZrO3 Films Obtained by Low Fluorine Chemical Solution Deposition

The Vortex Path Model Analysis of the Field Angle Dependence of the Critical Current Density in Nanocomposite YBa2Cu3 O 7−x – BaZrO3 Films Obtained by Low Fluorine Chemical Solution Deposition

Nanorod Self-Assembly in High Jc YBa2Cu3O7−x Films with Ru-Based Double Perovskites

Improvement in Jc performance below liquid nitrogen temperature for SmBa2Cu3Oy superconducting films with BaHfO3 nano-rods controlled by low-temperature growth

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