Granular superconductivity inR1Ba2Cu3O7−δthin films

1988 ◽  
Vol 38 (10) ◽  
pp. 7125-7128 ◽  
Author(s):  
P. England ◽  
T. Venkatesan ◽  
X. D. Wu ◽  
A. Inam
Keyword(s):  
Granular Superconductivity

SUPERCONDUCTIVITY ASSOCIATED WITH THE GRANULAR STRUCTURE IN Ba2YCu3O7−δ

1988 ◽  
Vol 02 (08) ◽  
pp. 1011-1015
Author(s):  
YONG ZHAO ◽  
QIRUI ZHANG ◽  
WEIYAN GUAN ◽  
JIANSHENG XIA ◽  
ZHENHUI HE ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Transport Properties ◽  
Single Phase ◽  
Granular Structure ◽  
Current Voltage ◽  
Granular Superconductivity ◽  
Current Voltage Characteristics ◽  
The Magnetic Field ◽  
Nonmonotonic Behavior

The dependence of the resistance on the magnetic field and the current-voltage characteristics of the single phase Ba 2 YCu 3 O 7−δ have been measured. The nonmonotonic behavior and a hysteresis of R(H) and the current-voltage characteristics suggest that the granular superconductivity exist in this material, and it plays an important role in transport properties.

scholarly journals Granular superconductivity in metallic and insulating nanocrystalline boron-doped diamond thin films

2010 ◽  
Vol 43 (37) ◽  
pp. 374019 ◽  
Author(s):  
B L Willems ◽  
G Zhang ◽  
J Vanacken ◽  
V V Moshchalkov ◽  
S D Janssens ◽  
...  
Keyword(s):  
Thin Films ◽  
Boron Doped Diamond ◽  
Boron Doped ◽  
Granular Superconductivity ◽  
Diamond Thin Films

Magnetic signature of granular superconductivity in electrodeposited Pb nanowires

2014 ◽  
Vol 115 (22) ◽  
pp. 223910 ◽  
Author(s):  
Alberto Riminucci ◽  
Walther Schwarzacher
Keyword(s):  
Magnetic Signature ◽  
Granular Superconductivity

TEMPERATURE DEPENDENCE OF THE QUANTUM INTERFERENCE PERIODICITY OF HIGH-TEMPERATURE SUPERCONDUCTIVE MATERIAL

1991 ◽  
Vol 05 (16) ◽  
pp. 1105-1108
Author(s):  
C. X. FAN ◽  
K. W. WONG
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Temperature Dependence ◽  
Linear Relationship ◽  
Field Dependence ◽  
Quantum Interference ◽  
Magnetic Field Dependence ◽  
Temperature Sensitive ◽  
Network System ◽  
Granular Superconductivity

The property of periodic magnetic field dependence observed on high temperature material is temperature sensitive. Experimental results show a linear relationship between τ2 and T4, where τ is the rf quantum interference period and T is temperature. This relation emerge from the entirety of weaklinks network system of granular superconductivity.

Evidence of Granular Superconductivity in Pr2<-zCezSr2Cu2NbO10

1998 ◽  
Vol 12 (29n31) ◽  
pp. 3074-3079 ◽  
Author(s):  
Howard A. Blackstead ◽  
John D. Dow ◽  
Israel Felner ◽  
H. Luo ◽  
David B. Pulling ◽  
...  
Keyword(s):  
Electron Spin Resonance ◽  
Critical Temperature ◽  
Neutron Diffraction ◽  
Surface Resistance ◽  
Superconducting Phase ◽  
Cooper Pairs ◽  
Bulk Superconductor ◽  
Spin Resonance ◽  
Granular Superconductivity ◽  
Multi Phase

Pr 2-z Ce z Sr2Cu2NbO10 (Pr222Nb10), is widely believed to not superconduct, although its homologues in which Pr is replaced by Nd, Sm, Eu, or Gd do (with Tc ≈ 28 K). On the basis of bulk resistivity, bulk diamagnetism, electron spin resonance, and surface resistance measurements of Pr222Nb10, we conclude that it does exhibit granular superconductivity (as predicted) with a critical temperature in the range 25–28 K, but is not currently a bulk superconductor. Neutron diffraction studies show that our Pr222Nb10 is multi-phase, but does not contain significant amounts of any (known) superconducting phase other than Pr222Nb10. It does contain ~ 23% PrSr defects, but far fewer SrPr impurities (<2%), so that the predicted antistructure defect ( SrPr , PrSr ) is probably not responsible for breaking Cooper pairs and destroying superconductivity, but the important half of it, PrSr , almost certainly is.

Sign in / Sign up

Export Citation Format

Share Document