Reference : Irreversible magnetization under rotating fields and lock-in effect on a ErBa2Cu3O7-delt...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/102973
Irreversible magnetization under rotating fields and lock-in effect on a ErBa2Cu3O7-delta single crystal with columnar defects
English
Avila, M. A. [> > > >]
Civale, L. [> > > >]
Silhanek, Alejandro mailto [Centro Atomico Bariloche (Argentina) > Instituto Balseiro > > >]
Ribeiro, R. A. [> > > >]
de Lima, O. F. [> > > >]
Lanza, H. [> >]
2001
Physical Review. B : Condensed Matter
American Institute of Physics
64
14
Yes (verified by ORBi)
International
0163-1829
New York
NY
[en] superconductivity
[en] We have measured the irreversible magnetization (M-i) of an ErBa2Cu3O7-delta single crystal with columnar defects (CD), using a technique based on sample rotation under a fixed magnetic field H. This method is valid for samples whose magnetization vector remains perpendicular to the sample surface over a wide angle range-which is the case for platelets and thin films-and presents several advantages over measurements of M-L(H) loops at fixed angles. The resulting M-i(Theta) curves for several temperatures show a peak in the CD direction at high fields. At lower fields, a very well defined plateau indicative of the vortex lock-in to the CD develops. The H dependence of the lock-in angle phi (L) follows the H-1 theoretical prediction, while the temperature dependence is in agreement with entropic smearing effects corresponding to long range vortex-defects interactions.
Researchers
http://hdl.handle.net/2268/102973
10.1103/PhysRevB.64.144502

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