Quasipermanent magnets of high temperature superconductor: Temperature dependence

In-Gann Chen, Jianxiong Liu, Yanru Ren, Roy Weinstein, Gregory Kozlowski, Charles E. Oberly

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


We report on persistent field in quasipermanent magnets of high temperature superconductors. Magnets composed of irradiated Y1+Ba 2Cu3O7 trapped field Bt=1.52 T at 77 K and 1.9 T at lower temperature. However, the activation magnet limited B t at lower temperature. We present data on Jc(H,T) for unirradiated materials, and calculate Bt at various T. Based upon data at 65 K we calculate Bt in unirradiated single grains at 20 K, and find that 5.2 T will be trapped for grain diameter d∼1.2 cm, and 7.9 T for d=2.3 cm. Irradiated grains will trap four times these values.

Original languageEnglish
Pages (from-to)3366-3368
Number of pages3
JournalApplied Physics Letters
Issue number25
Publication statusPublished - 1993 Dec 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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