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Superconductivity of ErBa2Cu3O7-S-ag Ceramic Composite
This paper reports the preparation method of ErBa2Cu3O7- - Ag composites with Ag content of 5 wt% - 25 wt% silver. Resistance measurement was done using the four-point probe method in the temperature range of 79 K to 300 K. We found that the addition of silver decreases the normal state resistivity of the composite significantly with increasing Ag content. At 5% wt of silver, Tc increases from 88 K (pure sample) to 91 K. However Tczero remained approximately constant at 91 K for further addition of 10, 15 and 20 wt. % of silver. At 25 wt. % silver content, Tc value drops drastically to 68.5 K. The paper reports on the preparation methods of the composite material and the results of the resistance measurement. These results offer the possibility of using this composite material for the manufacture of superconducting wires. [Authors' abstract].
Electrical Study of Bi2-xPbxSr2Ca2Cu3O10-S High Temperature Superconductor
However, further comparison revealed that the slow cooled samples have improved superconductivity indicating higher 2223 phase formation compared to the air quenched samples for 0.08
Longitudinal and Shear Sound Velocity in Some High Tc Superconductors and Related Materials
In this paper we report ultrasonic velocity measurements on bulk ceramic PrBa2Cu3O7-8 and ErBa2Cu3O7-8 (Tczero = 92 K) orthorhombic samples at 10 MHz in the temperature range of 80 K to 300 K and 80 K to 240 K for longitudinal and shear modes respectively. We found longitudinal and shear velocity changes of around 4% and 3% respectively during warming and cooling of the samples. In addition,longitudinal velocity in both samples showed existence of a hysteresis in the temperature range of 190 K to 230 K. Shear measurements showed oxistence of an anomaly (pronounced slope change) at around 210 K to 220 K which may be related to the longitudinal hysteresis of both samples. Existence of the 200 K - 240 K hysteresis and related anomalies was explained in terms of possible oxygen ordering related to Ortho-I and Ortho-II phase transition in the materials. [Authors' abstract].
Frontiers Of Physics 1998, Proceedings Of The Intl Mtg
Contents:Progress of RFQ and Superconducting Accelerators in China (C E Chen et al.)QCD Phase Transition in the Laboratory and in the Early Universe (B Sinha)Frontiers in Ultrafast Laser Science (W Sibbett)Asymmetries of Sea Quark Distributions in Baryons (M Alberg et al.)A Variational Approach to Many-Particle Systems (C K Kim et al.)Synchrotron Radiation Activities at KEK (M Kihara)Results of the UNU/ICTP PFF Network (S Lee)New Generation Positron-Atom Scattering Theories (K Ratnavelu)Superconducting Pairing of Quarks in QCD (N V Hieu & L T Tuong)Photon-Gated Persistent Spectral Hole Burning (Y X Nie & L Z Zhao)Wind Driven Circulation of the South China Sea (A Camerlengo)Effect of Soil Type on Environmental Terrestrial Gamma Radiation Dose in Johor State, Malaysia (A T Ramli et al.)Research in Optical Fibres Devices at Telekom Malaysia Photonics Laboratory (H B Ahmad et al.)Simplifying Complexity (W A T Wan Abdullah)Gravitational Wave Detection in the Laboratory (Y T Chen et al.)and other papers Readership: Theoretical physicists.
Solid State Science and Technology
This book contains papers presented at the Second International Conference on Solid State Science and Technology 2006, ICSSST 2006, a three-day conference on solid state science and technology. The conference provides a forum for the exchange of knowledge in a highly interdisciplinary field and brings together scientists working in academic and applied research in the field of solid state science and technology.
Routledge Handbook of Contemporary Brunei
The Routledge Handbook of Contemporary Brunei presents an overview of significant themes, issues, and challenges pertinent to Brunei Darussalam in the twenty-first century. Multidisciplinary in coverage, the contributions cover topics relating to philology, history, religion, language and literature, geography, international relations, economics, politics and sociocultural traditions. The Handbook is structured in eight parts: Foundations History Faith and Ethnicity Literature Language and Education Economics Material Culture Empowerment Chapters focus on the recent past and contemporary developments in this unique country which has remained a Malay Muslim sultanate, sustaining its religious...
Bangladesh
A. P. H.
A Biography of Malaysian Writers
English translation of: Wajah.
