Persistent magnetic fields trapped in high Tc superconductor

R. Weinstein, In Gann Chen, J. Liu, D. Parks, V. Selvamanickam, K. Salama

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Abstract

A study of field trapping by the incomplete Meissner effect was performed on YBa2Cu3O7-x at 77 K on both sintered and oriented grain samples. Fields of up to BT=1280 G have been trapped in small, oriented grain, planar samples. Circulating persistent current densities of up to 4800 A/cm2 are calculated. Based on these values hollow cylinders of 2 cm i.d. will trap fields of 6000 G. Initial creep is about 10%/week for both types of samples. Creep rate varies as (BT/B T,max)2. BT, due to an external field B 0, is BT∝(1-e-cB0/B T,max). Lamination and mosaic assembly steps for producing practical magnets have been performed.

Original languageEnglish
Pages (from-to)1475-1477
Number of pages3
JournalApplied Physics Letters
Volume56
Issue number15
DOIs
Publication statusPublished - 1990 Dec 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Weinstein, R., Chen, I. G., Liu, J., Parks, D., Selvamanickam, V., & Salama, K. (1990). Persistent magnetic fields trapped in high Tc superconductor. Applied Physics Letters, 56(15), 1475-1477. https://doi.org/10.1063/1.103207