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About this product
- DescriptionThe book covers the flux pinning mechanisms and properties and the electromagnetic phemena caused by the flux pinning common for metallic, high-Tc and MgB2 superconductors. The condensation energy interaction kwn for rmal 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 rmal electrons in the rmal 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 superconductor, specimen size and electric field strength. Recent developments of critical current properties in various high-Tc superconductors and MgB2 are introduced. Other topics are: singularity in the case of transport current in a parallel magnetic field such as deviation from the Josephson relation, reversible flux motion inside pinning potentials which causes deviation from the critical state model prediction, the concept of the minimization of energy dissipation in the flux pinning phemena which gives the basis for the critical state model, etc. Significant reduction in the AC loss in AC wires with very fine filaments originates from the reversible flux motion which is dominant in the two-dimensional pinning. The concept of minimum energy dissipation explains also the behavior of flux bundle size which determines the irreversibility line under the flux creep. The new edition has been thoroughly updated, with new sections on the progress in enhancing the critical current density in high temperature superconductors by introduction of artificial pinning centers, the effect of packing density on the critical current density and irreversibility field in MgB2 and derivation of the force-balance equation from the minimization of the free energy including the pinning energy.
- Author BiographyProf. Dr. Teruo Matsushita Kyushu Institute of Technology Kawazu 680-4 820-8502 Iizuka, Japan.
- Author(s)Teruo Matsushita
- PublisherSpringer-Verlag Berlin and Heidelberg GmbH & Co. KG
- Date of Publication21/02/2014
- SubjectElectronics Engineering & Communications Engineering
- Series TitleSpringer Series in Solid-State Sciences
- Series Part/Volume Number178
- Place of PublicationBerlin
- Country of PublicationGermany
- ImprintSpringer-Verlag Berlin and Heidelberg GmbH & Co. K
- Content Note327 black & white illustrations, biography
- Weight895 g
- Width155 mm
- Height235 mm
- Spine27 mm
- Edition Statement2nd Edition of 2014
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