Anomalous splitting of the first penetration peak in the local magnetization of Bi2Sr2CaCu2O8+y single crystals
Date
2005
Authors
Mihalache, V.
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Source Title
Journal of Optoelectronics and Advanced Materials
Print ISSN
1454-4164
Electronic ISSN
Publisher
Institutul National de Cercetare-Dezvoltare pentru Optoelectronica
Volume
7
Issue
6
Pages
3029 - 3032
Language
English
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Volume Title
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Abstract
A scanning Hall probe microscope (SHPM) with an effective spatial resolution of ∼1 μm has been used to study the local induction in high quality superconducting Bi2Sr2CaCu2O 8+δ single crystals at high temperatures and low magnetic fields. We observed, for the first time to our knowledge, an anomalous splitting of the peak of first full penetration of magnetic field. We discuss the observed splitting, which is connected to the effects of surface and geometrical barriers on the vortex lattice.