Layer Thickness Dependence of Transport Properties in Y1Ba2Cu3O7-y Superconducting Multilayer Films

1991 ◽  
Vol 235 ◽  
Author(s):  
Sang Yeol Lee ◽  
Eiki Narumi ◽  
David T. Shaw
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Magnetic Field Dependence ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Pinning Force ◽  
Superconducting Thin Films ◽  
Superconducting Properties ◽  
Flux Pinning Force

ABSTRACTMultilayers of Y1Ba2Cu3O7-y/Y1Ba2(Cu1−xNix)3O7-ysuperconducting thin films have been grown epitaxially on (100) ZrO2 substrates using a pulsed laser deposition technique. The thickness of the Y1Ba2Cu3O7-y layer was varied from 60 Å to 900 Å and the thickness of the Y1Ba2(Cu1−xNix3O7-y layer was varied from 60 A to 100 A to determine the effect of the Ni-doped layers on the superconducting properties. Variations of critical current density were investigated as a function of temperature in magnetic fields up to 5 T. Magnetic field dependence of normalized critical current density, Jc(H)/Jc(O), is improved by the growth of Ni-doped multilayer structures, possibly due to an increase in flux pinning force.

Nanostructured epitaxial thin films of Fe-based superconductors with enhanced superconducting properties

2012 ◽  
Vol 1434 ◽  
Author(s):  
P. Mele ◽  
K. Matsumoto ◽  
H. Nagayoshi ◽  
K. Fujita ◽  
Y. Yoshida ◽  
...  
Keyword(s):  
Thin Films ◽  
Critical Current Density ◽  
Single Crystal ◽  
Critical Current ◽  
Current Density ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Superconducting Film ◽  
Epitaxial Thin Films ◽  
Superconducting Properties

ABSTRACTEpitaxial Fe-Te-Se thin films were deposited by pulsed laser deposition at 250 ~ 600 °C on SrTiO3 (100, STO), MgO (100), LaAlO3 (100, LAO) and CaF2 (100) single crystal substrates. Best superconducting film was grown on CaF2: Tconset = 20.0 K and Tc0 = 16.18 K with Tdep = 300 °C, 45000 pulses, 3 Hz. The critical current density Jc at 4.2 K was 0.41×106A/cm2 at 0 T and 0.23×106 A/cm2 at 9 T. Angular dependence of Jc showed broad c-axis correlated peak when B ≥ 3 T.

Characterization of superconducting SmBa2Cu3O7 films grown by pulsed laser deposition

2002 ◽  
Vol 17 (10) ◽  
pp. 2599-2603 ◽  
Author(s):  
Q. X. Jia ◽  
S. R. Foltyn ◽  
J. Y. Coulter ◽  
J. F. Smith ◽  
M. P. Maley
Keyword(s):  
Transition Temperature ◽  
Critical Current Density ◽  
Pulsed Laser Deposition ◽  
Critical Current ◽  
Current Density ◽  
Deposition Temperature ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Superconducting Transition ◽  
Transition Width

We have investigated epitaxial superconducting SmBa2Cu3O7 (Sm123) films grown by pulsed-laser deposition on single-crystal SrTiO3 substrates. The deposition temperature plays an important role in determining the superconducting properties of Sm123 films. The superconducting transition temperature increases with the deposition temperature whereas the transition width decreases at deposition temperatures in the range of 700–875 °C. A Sm123 film deposited at 850 °C exhibits a transition temperature above 93 K with a transition width less than 0.5 K. Even though Sm123 films exhibit a higher transition temperature than Yba2Cu3O7 (Y123), the Sm123 shows lower critical current density at liquid-nitrogen temperature. The nominal critical current density of Sm123 film is less than 1 MA/cm2 at 75.4 K. Nevertheless, the Sm123 films have less anisotropy and stronger pinning characteristics compared to Y123. They are also much smoother with fewer particulates, as revealed by scanning electron microscopy.

scholarly journals Increased flux pinning force and critical current density in MgB2 by nano-La2O3 doping

2020 ◽  
Vol 756 ◽  
pp. 012019
Author(s):  
Danlu Zhang ◽  
Fang Wan ◽  
Michael D. Sumption ◽  
Edward W. Collings ◽  
CJ Thong ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Flux Pinning ◽  
Pinning Force ◽  
Flux Pinning Force

Correlation between Film Thickness and Critical Current Density of Sm1+xBa2-xCu3O6+δ Films Deposited by Pulsed Laser Deposition

2002 ◽  
Vol 41 (Part 2, No. 9A/B) ◽  
pp. L983-L985 ◽  
Author(s):  
Kimihiko Sudoh ◽  
Yusuke Ichino ◽  
Masakazu Itoh ◽  
Yutaka Yoshida ◽  
Yoshiaki Takai ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Film Thickness ◽  
Pulsed Laser Deposition ◽  
Critical Current ◽  
Current Density ◽  
Pulsed Laser ◽  
Laser Deposition

Effect of Pulsed Magnetic Field Processing on MgB2 Superconductors

2007 ◽  
Vol 546-549 ◽  
pp. 2063-2066 ◽  
Author(s):  
W.X. Li ◽  
Ying Li ◽  
M.Y. Zhu ◽  
R.H. Chen ◽  
H.M. Jin ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Pulsed Magnetic Field ◽  
Pinning Force ◽  
Critical Current Density Jc ◽  
Mgb2 Superconductors ◽  
Doped Mgb2 ◽  
Flux Pinning Force

Pulsed magnetic field was first employed in the study on MgB2 superconductors. Superconductivity properties and microstructures of Zn and SiC doped MgB2 were discussed in this paper. The superconductors showed different superconductivities after magnetic sintering. Critical current density and flux pinning force were relevant to the dopants properties in MgB2. Grains in the pulsed magnetic processed MgB2 matrix were smaller than those in the normal processed one. The refinement microstructures have caused the critical current density (Jc) anisotropy in both the Zn and SiC doped MgB2.

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