Transition from elastic to dissipative motion in a magnet-high-Tc superconductor system

Johansen, T.H. (author): Department of Physics, University of Oslo, Oslo, Norway

Bratsberg, H. (author): Department of Physics, University of Oslo, Oslo, Norway

Yang, Z.J. (author): Department of Physics, University of Oslo, Oslo, Norway

(creator_code:org_t)

AIP Publishing, 1991
1991
English.
In: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 70:12, s. 7496-7499

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

Using quasistatic harmonic excitations, we have measured the lateral force between a permanent magnet and a Bi-based ceramic high-Tc superconductor (HTSC) for lateral displacement amplitudes down to 1 µm. We find clear evidence for a transition from elastic (nondissipative) to inelastic interaction, and attribute the effect to flux pinning. The crossover amplitude can easily reach several micrometers, with the consequence that the lateral disturbance of a levitated magnet will decay to this amplitude, whereas further damping will be extremely slow. For applications of HTSCs in magnetic bearing systems this can be a very relevant aspect of the interaction, and it can set the limit for precision positioning of levitated objects

By the author/editor: Johansen, T.H.; Bratsberg, H.; Yang, Z.J.; Guo, S.J.; Loberg, Bengt

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Other Materials ...

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