Preparation and superconducting properties of YBa2Cu4O8
โ Scribed by T. Miyatake; K. Yamaguchi; T. Takata; S. Gotoh; N. Koshizuka; S. Tanaka
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 315 KB
- Volume
- 160
- Category
- Article
- ISSN
- 0921-4534
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โฆ Synopsis
Samples of YBazCudOs are prepared by means of a new high oxygen pressure technique employing oxygen-HIP. Both magnetization and resistivity measurements show the superconductivity transition at 82.5 K. The lower and upper critical fields of YBa&_t40s are obtained from the magnetization measurements. The Ginzburg-Landau parameters, r(O) = 17 A, n(O) =2400 A, are estimated from these results.
๐ SIMILAR VOLUMES
We have presented the results of Zn and Ga substitution in place of Cu in YBa,&Os (Y-124). The samples of YBaZ(Cu,\_,Zn,)40s with x=0.00-0.20 and YBaZ(Cu,\_,GaX)dOs with x=0.01-0.10 were synthesised at ambient oxygen pressure using sodium oxalate. With increase in concentration of Zn in Y-124 no sig
Surface pro5le images have been recorded from high-Tc superconducting YBa 2 Cu 4 O 8 using high-resolution transmission electron microscopy. The surface regions are found to be relatively more stable than those of YBa 2 Cu 3 O 7 . The stability of the double CuO chains in the vicinity of a crystal s