Nonglassy relaxation by double kinks in with columnar defects

D. Niebieskikwiat, L. Civale, C. Balseiro, G. Nieva

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We present long-term relaxation measurements of the irreversible magnetization in (Formula presented) single crystals with columnar defects. Within the single vortex pinning regime we find a nonglassy response at intermediate currents, in between the half loops and superkinks glassy regimes. We demonstrate that such behavior is due to double kink excitations whose critical nucleus has a size independent of current, and occur even in the presence of pinning energy dispersion.

Original languageEnglish
Pages (from-to)7135-7141
Number of pages7
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number10
StatePublished - 2000
Externally publishedYes

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