A.C. Losses and Flux Pinning and Formation of Stripe Phase

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Nova Publishers, 2000 - Technology & Engineering - 240 pages
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Contents: Transport AC Losses in Bi-2223 High Tc Multifilamentary Tapes; Numerical Calculation of AC Losses in HTS Wires; AC Loss in Supeconducting Power Cables; Studies of Vortex Localisation by Columnar Defects in High Temperature Superconductors; Superconductivity and Structure in La2-x Mx CuO4, (M: Ba, Sr and Nd, Sr); About the Extended t-J Model and Stripe Phases; Spin Stripe Dimerisation in the t-J Model; Subject Index
 

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Contents

TRANSPORT AC LOSSES IN Bi2223 HIGH Tc MULTIFILAMENTARY TAPES
1
Architecture nonuniformities and current transfer
2
Transport ac losses in Bi2223 tapes in form of a helix
18
Magnetic screening and interfilamentary decoupling
28
Concluding remarks
48
NUMERICAL CALCULATION OF AC LOSSES IN HTS WIRES
53
Theoretical model and numerical function
54
Examples of numerical results
61
La2xMxCuO₄ structures and superconductivity
158
La2xMxCuO₄
168
La2xMxCuO₄
170
La2xMxCuO₄ and other rare earth substituions
171
Discussion
174
References
175
ABOUT THE EXTENDED tJ MODEL AND STRIPE PHASES
181
Coulomb repulsion vs Hole bound states
182

Concluding remarks
70
Refernces
71
AC LOSS IN SUPERCONDUCTING POWER CABLES
73
AC loss in superconducting tapes
74
Power cables
79
References
110
STUDIES OF VORTEX LOCALIZATION BY COLUMNAR DEFECTS IN HIGH TEMPERATURE SUPERCONDUCTORS
113
Ideal defect geometry for maximum flux pinning in HTSC materials
116
Heavy ion irradiation and the mechanism of columnar defect formation
119
Vortex dybnamics in the presence of columnar defects
123
Columnar defects and flux pinning in YBCO family of cuprates
129
Pinning by columnar defects in Bi and TIfamily of cuprates
136
Concluding remarks
149
References
151
SUPERCONDUCTIVITY AND STRUCTURE IN La2xMxCuO₄ MBa Sr Nd Sr
157
stripe stability
189
Spin incommensurability and metallic behaviour
195
References
201
SPIN STRIPE DIMERIZATION IN THE tJ MODEL
205
Zero Doping
207
Single Hole Dispersion
209
The spinwavehole interaction stabilization of the dimer order
214
Direct comparison of ground state energies of the Neel state and the spin dimerized state
217
Spindimer order parameter and transition to The normal Fermi Liquid doping
218
Shape of the Fermi surface and PES intensity
220
Conclusions
221
References
222
Consolidated list of Authors of Volumes 1 to 32
225
Subject Index
235
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