عنوان
پدید آورنده
موضوع
رده
کتابخانه
محل استقرار
NATIONAL BIBLIOGRAPHY NUMBER
Number
TLpq230738823
LANGUAGE OF THE ITEM
.Language of Text, Soundtrack etc
انگلیسی
TITLE AND STATEMENT OF RESPONSIBILITY
Title Proper
Critical currents and pinning forces in yttrium(1) barium(2) copper(3) oxygen(7-delta) high critical transition temperature superconductor
General Material Designation
[Thesis]
First Statement of Responsibility
M. M. H. Abdelhadi
.PUBLICATION, DISTRIBUTION, ETC
Name of Publisher, Distributor, etc.
King Fahd University of Petroleum and Minerals (Saudi Arabia)
Date of Publication, Distribution, etc.
1993
PHYSICAL DESCRIPTION
Specific Material Designation and Extent of Item
141
DISSERTATION (THESIS) NOTE
Dissertation or thesis details and type of degree
M.S.
Body granting the degree
King Fahd University of Petroleum and Minerals (Saudi Arabia)
Text preceding or following the note
1993
SUMMARY OR ABSTRACT
Text of Note
Current-Voltage measurements in the presence of a small magnetic field have been preformed on high quality samples of usdY\sb{123}usd and usdY\sb{123}/(Ag\sb2O)\sb{x}usd Hi-usdT\sb{c}usd superconductors, to study the behaviour of the critical currents, pinning forces and flux flow resistance (FFR) near usdT\sb{c}usd. The addition of usdAg\sb2Ousd enhances the critical currents and reduces the flux flow resistance in all flux flow regions. Moreover FFR exhibits a broad minimum at low temperatures, then diverges near usdT\sb{c}usd. This minimum becomes sharper in the field cooled states of usdY\sb{123}usd, and occurs at fields near usdB\sb{c}usd. The field cooled pinning forces follow a scaling behaviour (near usdT\sb{c}usd) as a function of the reduced field usdB/B\sb{c2}.usd Furthermore, Viscosity coefficient usd\etausd, deduced from the FFR and Kim's model, displays sharp peaks for different usdAg\sb2Ousd concentrations x, with sharper peaks for higher x. Viscosity coefficient usd\etausd versus temperature exhibits broad maximum at low temperatures and decreases rapidly close to usdT\sb{c}usd.
TOPICAL NAME USED AS SUBJECT
Condensation
Pure sciences
PERSONAL NAME - PRIMARY RESPONSIBILITY
M. M. H. Abdelhadi
ELECTRONIC LOCATION AND ACCESS
Electronic name
مطالعه متن کتاب p
[Thesis]
276903
a
Y
