Journal ArticleDOI
Effect of ion-irradiation and annealing on superconductive property of PLD prepared YBCO tapes
K. Nakashima,Noriko Chikumoto,Akira Ibi,Seiki Miyata,Yasuji Yamada,Toshiharu Kubo,Aya Suzuki,Takayuki Terai +7 more
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In this paper, the effect of ion-irradiation on superconductive properties of YBCO tapes was investigated for the effective condition which enhances the superconductivity of the tapes.Abstract:
PLD (pulsed laser deposition) prepared YBCO tapes were irradiated by 450 MeV Xe 23+ or 500 MeV Au 31+ ions with irradiation fluence from 1.0 × 10 10 to 1.0 × 10 12 ions/cm 2 to investigate for the effective condition which enhances J c . As a result of ion-irradiation, we observed the enhancement of J c especially at high applied magnetic field in 77 K. It was also shown that T c decreased with irradiation fluence. These changes of superconductive properties were found to depend on the kind of the ion and the energy. We also studied post-annealing effect on the irradiated tapes. After the ion-irradiation, the samples were annealed at the temperature of 473 K or 673 K in the oxygen atmosphere for 2 h and then quenched. From the post-annealing experiments, we concluded that the post-annealing was a good way to recover T c without decreasing J c .read more
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SiO2 nanoparticles addition effect on microstructure and pinning properties in YBa2Cu3Oy
M. Ben Salem,E. Hannachi,Yassine Slimani,A. Hamrita,M. Zouaoui,Lotfi Bessais,M. Ben Salem,F. Ben Azzouz,F. Ben Azzouz +8 more
TL;DR: A series of YBa 2 Cu 3 O y (YBCO, Y-123) samples with small amounts of nanosized SiO 2 particles (30-nm) are synthesized in air using a solid-state reaction route.
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Higher intra-granular and inter-granular performances of YBCO superconductor with TiO2 nano-sized particles addition
TL;DR: In this paper, the impact of titanium oxide (TiO 2 ) nanoparticles addition on the intra-granular and intergranular properties of YBa 2 Cu 3 O 7-y (Y-123) were thoroughly investigated.
Journal ArticleDOI
Flux pinning by discontinuous columnar defects in 74 MeV Ag-irradiated YBa2Cu3O7 coated conductors
N. M. Strickland,Evgueni F. Talantsev,Nicholas J. Long,J.A. Xia,S.D. Searle,John Kennedy,Andreas Markwitz,Marty Rupich,Xiaoping Li,Srivatsan Sathyamurthy +9 more
TL;DR: In this paper, the in-field transport critical current (I c ) is enhanced significantly for fields applied parallel to the irradiation direction with a broad peak appearing in the magnetic field-angle dependence of the critical current.
Journal ArticleDOI
Effect of SiO2 nano-particles and nano-wires on microstructure and pinning properties of YBa2Cu3O7-d
TL;DR: A comparative study of the effects of nanosized silicon oxide nano-particle (NP) and nano-wire (NW) additions during the final processing stage on the microstructure and superconducting properties of polycrystalline YBa2Cu3Oy (YBCO, or Y-123) was carried out as mentioned in this paper.
Journal ArticleDOI
Activation energy and excess conductivity analysis of (Ag)x/CuTl-1223 nano-superconductor composites
Ghulam Hussain,Abdul Jabbar,Irfan Qasim,Muhammad Waseem Mumtaz,Kashif Nadeem,Muhammad Zubair,S. Qamar Abbas,Aqeel A. Khurram +7 more
TL;DR: In this paper, the activation energy and zero resistivity critical temperature were increased with increasing contents of Ag nanoparticles in (CuTl-1223) phase up to x'='2.0'
References
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Journal ArticleDOI
A Monte Carlo computer program for the transport of energetic ions in amorphous targets
J.P. Biersack,L.G. Haggmark +1 more
TL;DR: In this article, a Monte Carlo computer program was developed for determining ion range and damage distributions as well as angular and energy distributions of backscattered and transmitted ions in amorphous targets.
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Anisotropic critical currents in Ba2YCu3O7 analyzed using an extended Bean model
TL;DR: In this paper, the authors extended the critical state model to explicitly include anisotropic critical currents and showed that current flow perpendicular to the Cu-O planes is about 30 times smaller than flow parallel to these planes.
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Distribution of activation energies for thermally activated flux motion in high-T_{c} superconductors: An inversion scheme
C.W. Hagen,R.P. Griessen +1 more
TL;DR: Within a thermally activated flux-motion model, an exact inversion scheme is derived which makes it possible to calculate the distribution of activation energies for flux motion from experimental magnetic relaxation data.
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Structures and effects of radiation damage in cuprate superconductors irradiated with several-hundred-MeV heavy ions
TL;DR: This paper reports a study of the nature and systematic variation of radiation damage to cuprate superconductors caused by several-hundred-MeV heavy ions.
Journal ArticleDOI
Experimental test of the postulate that continuous columnar pinning centers produce the highest Jc
TL;DR: Continuous columnar pinning centers, created by energetic ions, have been usefully studied theoretically and experimentally to investigate vortex physics in high T c superconductors as mentioned in this paper, but along the way, in error, their discontinuities have been downplayed, and they have been anointed as the way to produce high J c.