Ac Losses in Type-II Superconductors [Book Chapter]

Clem, John R.

doi:10.1007/978-1-4899-2379-0_8

Ac Losses in Type-II Superconductors [Book Chapter]

Conference · Tue Jan 01 04:00:00 EST 1991 · Magnetic Susceptibility of Superconductors and Other Spin Systems

DOI:https://doi.org/10.1007/978-1-4899-2379-0_8· OSTI ID:5557906

Clem, John R. ^[1]

Ames Laboratory, and Iowa State Univ., Ames, IA (United States)

This paper discusses the physics of ac losses in type-II superconductors and in multifilamentary superconducting-normal composite conductors. As an introduction, the ac eddy-current losses in a homogeneous normal conducting cylindrical specimen subjected to an alternating applied magnetic field are briefly reviewed. The ac losses in a superconducting cylindrical specimen next are discussed in detail, with emphasis on the losses in a specimen subjected to an alternating applied longitudinal magnetic field. In general, dissipation occurs via both flux-flow losses, which are analogous to eddy-current losses in the normal state, and hysteretic losses, which arise from bulk and surface pinning as well as annihilation of vortices of the opposite sense. Tests are suggested by which the dominant loss mechanisms can be identified. Special considerations are noted for the case of the high-temperature superconductors. Finally, the losses in multifilamentary superconducting-normal composite conductors are discussed.

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Research Organization:: Ames Laboratory, IA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: W-7405-ENG-82

OSTI ID:: 5557906

Report Number(s):: IS-M--669; CONF-9105147--1; ON: DE91015201; ISBN: 978-0-306-44197-4

Conference Information:: Journal Name: Magnetic Susceptibility of Superconductors and Other Spin Systems

Country of Publication:: United States

Language:: English

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Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
AC LOSSES
COMPOSITE MATERIALS
CURRENTS
EDDY CURRENTS
ELECTRIC CURRENTS
ENERGY LOSSES
EQUATIONS
HYSTERESIS
LOSSES
MAGNETIC FIELDS
MAGNETIC FLUX
MATERIALS
SUPERCONDUCTORS
TYPE-II SUPERCONDUCTORS

Ac Losses in Type-II Superconductors [Book Chapter]

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