Reference : Suppression of matching field effects by splay and pinning energy dispersion in YBa2Cu3O...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/102011
Suppression of matching field effects by splay and pinning energy dispersion in YBa2Cu3O7 with columnar defects
English
Niebieskikwiat, D. [> > > >]
Silhanek, Alejandro mailto [Centro Atomico Bariloche (Argentina) > Instituto Balseiro > > >]
Civale, L. [> > > >]
Nieva, G. [> > > >]
Levy, P. [> > > >]
Krusin-Elbaum, L. [> >]
2001
Physical Review. B : Condensed Matter
American Institute of Physics
63
14
Yes (verified by ORBi)
International
0163-1829
New York
NY
[en] superconductivity
[en] We report measurements of the irreversible magnetization M-i of a large number of YBa2Cu3O7 single crystals with columnar defects (CD). Some of them exhibit a maximum in M-i when the density of vortices equals the density of tracks, at temperatures above 40 K. We show that the observation of these matching field effects is constrained to those crystals where the orientational and pinning energy dispersion of the CD system lies below a certain threshold. The amount of such dispersion is determined by the mass and energy of the irradiation ions, and by the crystal thickness. Time relaxation measurements show that the matching effects are associated with a reduction of the creep rate, and occur deep into the collective pinning regime.
Researchers
http://hdl.handle.net/2268/102011

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