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Author
Niebieskikwiat, D.
;
Civale, L.
;
Balseiro, C.A.
;
Nieva, G.
Title
Nonglassy relaxation by double kinks in YBa2Cu3O7-delta with columnar defects
Type
Journal Article
Year
2000
Publication
PHYSICAL REVIEW B
Abbreviated Journal
Volume
61
Issue
10
Pages
7135-7141
Keywords
Abstract
We present long-term relaxation measurements of the irreversible magnetization in YBa2Cu3O7-delta 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.
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1098-0121
ISBN
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Notes
ISI:000085985800092
Approved
no
Call Number
BT @ hernan @
Serial
229
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