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Superconducting “Islands” Could Lead to Magnetic Memory

Ferromagnetism and superconductivity don’t play well together. Ordinarily the two phenomena—ferromagnetism grants garden-variety permanent magnets their magnetic fields and superconductivity expels the internal magnetic fields of certain materials cooled below critical temperatures—seem to cancel each other out.But under uncommon circumstances, the two phenomena can behave with one another. One such…
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