Reference : Evidence for vortex staircases in the whole angular range due to competing correlated...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Evidence for vortex staircases in the whole angular range due to competing correlated pinning mechanisms
Silhanek, Alejandro mailto [Centro Atomico Bariloche & Instituto Balseiro > > > > >]
Civale, L. [Centro Atomico Bariloche (Argentina) > Instituto Balseiro > > >]
Candia, S. [> > > >]
Nieva, G. [> > > >]
Pasquini, G. [> > > >]
Lanza, H. [> >]
Physical Review. B : Condensed Matter
American Institute of Physics
Yes (verified by ORBi)
New York
[en] superconductivity
[en] We present measurements of the angular dependence of the irreversible magnetization of YBa2Cu3O7 single crystals with columnar defects inclined with respect to the c axis. At high fields a sharp maximum centered at the tracks direction is observed. At low fields we identify a lock-in phase characterized by an angle-independent pinning strength and observe an angular shift of the peak towards the c axis that originates in the misalignment between vortices and applied field in anisotropic materials. The interplay among columnar defects, twins, and intrinsic pinning by the ab planes generates a variety of staircase structures. We show that correlated pinning dominates for all orientations of the applied field. [S0163-1829(99)09417-5].

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