A new concept for developing a compact joint structure for reducing joint resistance between high-temperature superconductors (HTS) and low-temperature superconductors (LTS)

2020 ◽  
Vol 33 (11) ◽  
pp. 115015
Author(s):  
Nobuya Banno ◽  
Toshihisa Asano ◽  
Takeharu Kato ◽  
Hideaki Maeda
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
High Temperature Superconductors ◽  
Joint Structure ◽  
Joint Resistance

Fluorine Substitution in High Temperature Superconductors

1999 ◽  
Vol 13 (09n10) ◽  
pp. 973-978 ◽  
Author(s):  
E. Bellingeri ◽  
G. Grasso ◽  
R. Gladyshevskii ◽  
E. Giannini ◽  
F. Marti ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Critical Temperature ◽  
Low Temperature ◽  
High Temperature Superconductors ◽  
Irreversibility Field ◽  
Fluorine Substitution ◽  
Superconducting Phases

Fluorine substitution in the Bi(2223), Bi(2212) and Tl(1223) superconducting phases was studied. We obtained superconducting structures, never observed before, of the Bi-based superconductors by a low temperature (200-400 °C) fluorination process. Fluorine substitutes completely the oxygen sites in the Bi layers and additional F atoms are inserted in the structure. As a consequence, changes in the arrangements of cation and anions were induced, especially in the Bi and partially in the Sr layer. F-doped Tl(1223) has been prepared in the same way as Bi(2223) and Bi(2212) (low temperature fluorination), but also starting from precursor containing fluorides of different elements. No significant differences in the crystal structure have been observed between the Tl-based samples with F inclusions and without. The critical temperature (116 K) remains unchanged but a significant increase of the irreversibility field at low temperature was found.

THE MULTILAYERED HIGH Tc SUPERCONDUCTORS; THE JOSEPHSON MODEL OF WEAK LINKS

1995 ◽  
Vol 09 (21) ◽  
pp. 2811-2820
Author(s):  
VALERY A. CHERENKOV
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
High Temperature Superconductors ◽  
Weak Links ◽  
High Tc Superconductors ◽  
Main Attention ◽  
Multilayered Structures ◽  
High Tc ◽  
Stimulation Of

The multilayered (N-S(D)-N)-types structures have been observed: there are the traditional Niobium low-temperature superconductors and new high-temperature superconductors. The main attention had been directed to the anisotropy, defectively and the stimulation of the superconductivity in the multilayered structures.

scholarly journals High-Temperature Superconductors and Related Compounds Studied by Mössbauer Spectroscopy

1993 ◽  
Vol 15 (3-4) ◽  
pp. 211-224 ◽  
Author(s):  
E. Kuzmann ◽  
Z. Homonnay ◽  
S. Nagy ◽  
M. Gál ◽  
A. Vértes
Keyword(s):  
Phase Transformation ◽  
Mössbauer Spectroscopy ◽  
High Temperature ◽  
Low Temperature ◽  
Mossbauer Spectroscopy ◽  
High Temperature Superconductors ◽  
Temperature Phase ◽  
Mößbauer Spectroscopy ◽  
Related Compounds ◽  
Low Temperature Phase

57Fe,119Sn, and151Eu Mössbauer spectroscopy was used to study the chemical structure, phonon mode changes, and low-temperature phase transformation around the Tcas well as suppression of superconductivity in high-temperature superconductors and related compounds. Anomalous temperature-dependent changes in the total57Fe spectral area fraction and in the Mössbauer line shift were simultaneously found around the Tcin a EuBa2(Cu0.9957Fe0.01)3O7-dsuperconductor. These anomalous changes were attributed to phonon softening and low-temperature phase transformation occurring around the superconducting transition. Significant differences were observed between the57Fe Mössbauer spectra of superconducting EuBa2(Cu0.9957Fe0.01)3O7-dand the isostructural non-superconducting PrBa2(Cu0.9957Fe0.01)3O7-d. The differences were interpreted in connection with the suppression of superconductivity (by hole filling or hybridization of Pr, Cu and O states) in the Pr-containing compound. The unusually high isomer shift value observed in the Pr-containing material can give evidence for the charge transfer mechanism between the Cu(1) chains and the Cu(2) planes and for its role in the suppression of superconductivity.

NOVEL VORTEX STRIPE PHASE UNDER STRONG MAGNETIC FIELD IN HIGH TEMPERATURE SUPERCONDUCTORS

2005 ◽  
Vol 19 (01n03) ◽  
pp. 9-12 ◽  
Author(s):  
YAN CHEN ◽  
Z. D. WANG ◽  
C. S. TING
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Low Temperature ◽  
Vortex Structure ◽  
High Temperature Superconductors ◽  
Density Wave ◽  
Spin Density Wave ◽  
Upper Critical Field ◽  
Stripe Phase ◽  
Stripe Phases

The nature of vortex structure in the mixed state of high-temperature superconductors (HTS) is investigated by solving the Bogoliubov-de Gennes equations with consideration of competition between antiferromagnetic (AF) and d-wave superconductivity (DSC) orders. By varying the applied magnetic field and temperature, the geometry of vortex structure can take two different forms: conventional vortex lattice (triangular or square), or vortex stripe phases where all the order parameters including spin density wave, charge density wave and superconducting order exhibit stripe-like behavior. This novel vortex stripe phases may show up at low temperature and adjacent to upper critical field H c2 Phase diagram of temperature dependence of H c2 will be presented. Our results may shed light on the understanding of the low-temperature H c2 anomalies in some HTS. New experiments are proposed to test our predictions.

H–T phase diagram for the giant magnetic flux jumps in low temperature superconductors and high temperature superconductors

1998 ◽  
Vol 83 (11) ◽  
pp. 7324-7326 ◽  
Author(s):  
V. V. Chabanenko ◽  
A. I. D’yachenko ◽  
A. V. Chabanenko ◽  
H. Szymczak ◽  
S. Piechota ◽  
...  
Keyword(s):  
Phase Diagram ◽  
High Temperature ◽  
Low Temperature ◽  
Magnetic Flux ◽  
High Temperature Superconductors ◽  
T Phase ◽  
Flux Jumps
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