Remanent nonlinear magnetic response in superconducting Y-Ba-Cu-O

13 August 1990

journal article
research article
Published by AIP Publishing in Applied Physics Letters

Vol. 57 (7) , 724-726
https://doi.org/10.1063/1.103599

Abstract

We report a ‘‘memory’’ effect in the response of sintered Y-Ba-Cu-O to alternating magnetic fields. The application of a steady bias field, above a certain threshold, causes the generation of harmonic components in the response. These harmonics persist after the field is removed, exhibiting a logarithmic decay with time. We explain these phenomena in the framework of the Bean model, taking into account the granularity of the sample. The memory phenomenon offers a principle for a new recording mechanism which may allow extremely high storage capacity.

Keywords

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