Detection of discretized single-shell penetration in mesoscopic vortex matter

We investigated configurational changes in mesoscopic vortex matter with less than thousand vortices during flux penetration in freestanding 50 \(\mu\)m diameter disks of Bi\(_{2}\)Sr\(_{2}\)CaCu\(_{2}\)O\(_{8 +\delta}\). High-resolution AC and DC local magnetometry data reveal oscillations in the t...

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Bibliographic Details
Published inarXiv.org
Main Authors Dolz, Moira Inés, Fasano, Yanina, Néstor René Cejas Bolecek, Pastoriza, Hernán, Konczykowski, Marcin, Cornelius Jacominus van der Beek
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 27.10.2014
Subjects
Discretization
Disks
Magnetic measurement
Magnetic signals
Penetration
Vortices
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Summary:We investigated configurational changes in mesoscopic vortex matter with less than thousand vortices during flux penetration in freestanding 50 \(\mu\)m diameter disks of Bi\(_{2}\)Sr\(_{2}\)CaCu\(_{2}\)O\(_{8 +\delta}\). High-resolution AC and DC local magnetometry data reveal oscillations in the transmittivity echoed in peaks in the third-harmonics magnetic signal fainting on increasing vortex density. By means of extra experimental evidence and a simple geometrical analysis we show that these features fingerprint the discretized entrance of single-shells of vortices having a shape that mimics the sample edge.
ISSN:2331-8422