Flux Pinning in Superconductors. 1st ed. 2007

種類:

電子ブック

責任表示:

by Teruo Matsushita

出版情報:

Berlin, Heidelberg : Springer Berlin Heidelberg : Imprint: Springer, 2007

著者名:

• Matsushita, Teruo.
• SpringerLink (Online service)

ISBN:

9783540445159 [3540445153]    

注記:

Introduction -- Fundamental Electromagnetic Phenomena in Superconductors -- Various Electromagnetic Phenomena -- Longitudinal Magnetic Field Effect -- Measurement Methods for Critical Current Density -- Flux Pinning Mechanism -- Flux Pinning Characteristics -- High-Temperature Superconductors -- MgB2 -- A1 Description of Equilibrium State -- A2 Magnetic Properties of a Small Superconductor -- A3 Minimization of Energy Dissipation -- A4 Partition of Pinning Energy -- A5 Comments on the Nonlocal Theory on the Elasticity of the Flux Line Lattice -- A6 Avalanching Flux Flow Model -- A7 Josephson Penetration Depth -- A8 Transverse Flux Bundle Size.
The book covers the flux pinning mechanisms and properties and the electromagnetic phenomena caused by the flux pinning common for metallic, high-Tc and MgB2 superconductors. The condensation energy interaction known for normal precipitates or grain boundaries and the kinetic energy interaction proposed for artificial Nb pins in Nb-Ti, etc., are introduced for the pinning mechanism. Summation theories to derive the critical current density are discussed in detail. Irreversible magnetization and AC loss caused by the flux pinning are also discussed. The loss originally stems from the ohmic dissipation of normal electrons in the normal core driven by the electric field induced by the flux motion. The readers will learn why the resultant loss is of hysteresis type in spite of such mechanism. The influence of the flux pinning on the vortex phase diagram in high Tc superconductors is discussed, and the dependencies of the irreversibility field are also described on other quantities such as anisotropy of supercondu

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