Preparation and x-ray pole-figure characterization of DC-sputtered Bi-2201, Bi-2212 and Bi-2223 thin films

Holiastou, M.; Psyharis, V.; Niarchos, D.; Haibach, P.; Frey, Urban; Adrian, H.

doi:10.1088/0953-2048/10/9/012

Cited by 9 publications

(8 citation statements)

References 9 publications

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“…On the other hand, a T zero c = 105 K and a sharper transition was obtained in Bi,Pb-2223 thin film after annealing. This confirms that sputtering deposition and annealing is an effective means of obtaining high quality of Bi,Pb-2223 thin films, as has been previously reported [4]- [6]. The importance of annealing temperature on the microstructure and superconducting properties of the films is demonstrated by the XRD data shown in Fig.…”

Section: Resultssupporting

confidence: 89%

Effect of Annealing DC-Sputtered Bi,Pb-2223 Thin Films

Matsumoto

Kitaguchi

Doi

et al. 2015

IEEE Trans. Appl. Supercond.

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Thin films of Bi-2223 fabricated on SrTiO 3 (100) substrates by dc sputtering were found to have a transition temperature (T c ) as low as that of bulk-phase Bi-2223. Subsequent annealing of these precursor films in the presence of Bi,Pb-2223 pellets increased this T c value from 72 to 105 K, making it comparable to bulk-phase Bi,Pb-2223. Strong (00l) peaks and a sharp quadrupole were observed in this annealed film, indicating a main phase of Bi,Pb-2223 with a c-axis orientation by the X-ray diffractometry (XRD) measurements. A maximum critical current density (J c ) of 3.3 × 10 5 A/cm 2 at 77 K was also obtained with the Bi,Pb-2223 thin film, which is a value that is much higher than that of commercial Bi,Pb-2223 tapes. J c values of thin films were strongly dependent on the annealing temperatures between 854 • C and 866 • C. In this temperature range, XRD data show that the thin films were not a single phase of Bi,Pb-2223, suggesting only a slight interruption of the supercurrent. Although, the films have a good c-axis and ab-axis alignments. Thus, although the films were not perfect, the improvement in microstructure allows for a much higher J c value.

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Section: Resultssupporting

confidence: 89%

Effect of Annealing DC-Sputtered Bi,Pb-2223 Thin Films

Matsumoto

Kitaguchi

Doi

et al. 2015

IEEE Trans. Appl. Supercond.

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“…The films are single phase and have their c-axis normal to the film surface, as was revealed by x-ray θ -2θ scans [11]. In addition, the films are fully epitaxial, which was checked by extensive single-crystal diffraction measurements [11] and confirmed by polarized micro Raman spectroscopy [12] [11].…”

Section: Superconducting Thin Films Of Bimentioning

confidence: 82%

“…C substrate temperature and 3 mbar pressure of pure oxygen. Details of the experimental conditions can be found in [11].…”

Section: Introductionmentioning

confidence: 99%

Simulation of magnetic relaxation measurements of tetragonal and thin films

Holiastou¹,

Pissas²,

Niarchos³

et al. 1998

Supercond. Sci. Technol.

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Magnetic relaxation data at various temperatures and magnetic fields are taken from high-quality, epitaxial thin films of and and are simulated using a method developed by Brandt and coworkers. Assuming thermally activated resistivity and logarithmic activation energy we obtain good simulations of the experimental data. The critical current resulting from the simulation is evaluated as a function of the temperature and is found to decrease linearly with it and the current-voltage characteristics are extracted and are linear on a scale at all temperatures. The activation energy is calculated as a function of the current and it is shown to be a decreasing function of the magnetic field following a power law . The critical current is also shown to decrease with the magnetic field and can be described well by the exponential form . Comparison between the two phases and indicates that pinning in the film is stronger due to the lower anisotropy of this phase and probably because of the existence of more defects. Finally, the distribution of the local magnetic moment and the magnetic induction on the surface of the film at different times during the relaxation procedure is nicely depicted with surface and contour plots.

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“…3 Thin film work has shown that stacking faults in the structure induce broadening and displacement of the X-ray diffraction peaks. 4 Moreover, a huge background, usually called "glassy phase" 5 usually accompanies the measured spectra.…”

Section: Introductionmentioning

confidence: 99%

Structure and Superconducting Properties of (Bi,Pb):2223 Superconductor with 3D Excess Conductivity

Ciurchea

2003

Int. J. Mod. Phys. B

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The full pattern decomposition method by Le Bail was applied to a single phase orthorhombic (Bi,Pb):2223 superconductor with an accentuated three dimensional excess conductivity. The space group Pmam, with the lattice parameters a = 5.2598, b = 5.5381, c = 37.174Å was found. The Fourier maps derived show that delocalization of the Sr atoms induces terracing of the Cu/Ca/Cu superconducting stacking of 0.3Å, close to the c-axis coherence length, yielding the three dimensional character of the conduction evidenced by the resistivity measurements.

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Preparation and x-ray pole-figure characterization of DC-sputtered Bi-2201, Bi-2212 and Bi-2223 thin films

Cited by 9 publications

References 9 publications

Effect of Annealing DC-Sputtered Bi,Pb-2223 Thin Films

Effect of Annealing DC-Sputtered Bi,Pb-2223 Thin Films

Simulation of magnetic relaxation measurements of tetragonal and thin films

Structure and Superconducting Properties of (Bi,Pb):2223 Superconductor with 3D Excess Conductivity

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