Modification of Structure and Properties of Superconducting YBaCuO Crystals by Combined Irradiations

2000 ◽  
Vol 659 ◽  
Author(s):  
Elvira M. Ibragimova ◽  
Marquis A. Kirk
Keyword(s):  
Magnetic Properties ◽  
Gamma Irradiation ◽  
Flux Pinning ◽  
Critical Parameter ◽  
Structure And Properties ◽  
Defect Clusters ◽  
Oxygen Defects ◽  
Diamagnetic Transition

ABSTRACTEffects of electron irradiations in combination with 60Co gamma-quanta on magnetic properties of YBa2Cu3O7−x crystals have been studied to determine the contribution from oxygen defects to the pinning, and the condition of improving the critical parameter, Jc, of the crystals. Irradiation with 300 keV electrons followed by gamma-irradiation makes strong oxygen disorder, causing degradation of SC-transition and appearance of diamagnetic transition at 200 K, but no flux pinning in H>1 Tesla at 77 K. However, it is shown that oxygen defects do contribute substantially to the flux pinning at cation-anion defect clusters in CuO-planes created by moderate fluences of 1 MeV-electrons. A model is suggested for different oxygen and copper defects induced by the irradiations.

scholarly journals Role of oxygen defects on the magnetic properties of ultra-small Sn1−xFexO2 nanoparticles

2013 ◽  
Vol 113 (17) ◽  
pp. 17B504 ◽  
Author(s):  
Kelsey Dodge ◽  
Jordan Chess ◽  
Josh Eixenberger ◽  
Gordon Alanko ◽  
Charles B. Hanna ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Oxygen Defects

scholarly journals FABRICATION AND PROPERTIES OF Co DOPED Bi0.5K0.5TiO3 – BiFeO3 SOLID SOLUTION

2018 ◽  
Vol 56 (1A) ◽  
pp. 197
Author(s):  
Nguyen Hoang Tuan
Keyword(s):  
Solid Solution ◽  
Raman Spectroscopy ◽  
Magnetic Properties ◽  
Crystal Structures ◽  
Solid Solutions ◽  
Sol Gel ◽  
Structure And Properties ◽  
Antiferromagnetic Ordering ◽  
Co Doped ◽  
Good Agreement

In this study, we present some results on the structure and properties of the solid solution of Bi0.5K0.5TiO3– BiFeCoO3 (BKT – BFCO) by Sol-gel method. Crystal structures of BKT – BFCO solid solutions were studies by XRD and Raman spectroscopy. The results were in good agreement with the previous reports of Bi0.5K0.5TiO3– BiFeO3 (BKT – BFO) and Bi0.5K0.5TiO3 – BiCoO3 (BKT – BCO) solid solutions. The magnetic properties were investigated via unsaturated M-H loop, which showed the competition of paramagnetic and antiferromagnetic ordering in BKT – BFCO. However, differing from the BKT – BFO and BKT – BCO solid solutions, the unclear values of saturated magnetism in BKT – BFCO raised the unexplained question, which needed further studies.

MAGNETIC PROPERTIES OF THE HIGH Tc SUPERCONDUCTORS BiSrCaCuO AND TlBaCaCuO

1989 ◽  
Vol 03 (01) ◽  
pp. 77-85 ◽  
Author(s):  
Y. D. DAI ◽  
C. LIN ◽  
W. B. ZHANG ◽  
S. Q. FENG ◽  
X. ZHU ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Flux Pinning ◽  
Magnetic Hysteresis ◽  
Hysteresis Loops ◽  
High Tc Superconductors ◽  
Magnetic Current ◽  
High Tc ◽  
Bean Model ◽  
Current Densities ◽  
Magnetic Hysteresis Loops

Magnetic properties of the high T c superconductors BiSrCaCuO and TlBaCaCuO were investigated systematically. Magnetic current densities were calculated from magnetic hysteresis loops of bulk and powdered samples by Bean model. The results showed that flux pinning in these materials is much weaker than that in YBaCuO.

The effect of gamma irradiation on the structure and properties of ester-ether elastomers

Polimery ◽  
1991 ◽  
Vol 36 (01) ◽  
pp. 18-22 ◽  
Author(s):  
IVO KLIER ◽  
ZBIGNIEW ROSLANIEC ◽  
VRATISLAV DUCHACEK
Keyword(s):  
Gamma Irradiation ◽  
Structure And Properties
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