ORBi: Gutierrez J. - Scanning Hall probe microscopy of unconventional vortex patterns in the two-gap MgB2 superconductor

Reference : Scanning Hall probe microscopy of unconventional vortex patterns in the two-gap MgB2 sup...


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/2268/119429

Title :	Scanning Hall probe microscopy of unconventional vortex patterns in the two-gap MgB2 superconductor
Language :	English
Author, co-author :	Gutierrez, J. [Katholieke Universiteit Leuven - KUL > Physics and Astronomy > > >]
	Raes, B. [Katholieke Universiteit Leuven - KUL > Physics and Astronomy > > >]
	Silhanek, Alejandro [Université de Liège - ULg > Département de physique > Physique de la matière condensée >]
	Li, L.J. [Katholieke Universiteit Leuven - KUL > Physics and Astronomy > > >]
	Zhigadlo, N.D. [ETH Zurich > Laboratory for Solid State Physics > > >]
	Karpinski, J. [ETH Zurich > Laboratory for Solid State Physics > > >]
	Tempere, J. [Universiteit Antwerpen - UA > TQC > > >]
	Moshchalkov, V.V. [Katholieke Universiteit Leuven - KUL > Physics and Astronomy > > >]
Publication date :	22-Mar-2012
Journal title :	Physical Review. B : Condensed Matter
Publisher :	American Institute of Physics
Volume :	85
Pages :	094511
Audience :	International
ISSN :	0163-1829
City :	New York
Country :	NY
Keywords :	[en] Type 1.5 superconductivity ; Two gaps superconductors
Abstract :	[en] The low magnetic field vortex patterns nucleation and evolution in a high-quality two-gap superconductor MgB2 single crystal have been investigated by low-temperature scanning Hall probe microscopy. Large areas have been imaged with single-vortex resolution while changing systematically the thermodynamic parameters for field and temperature. The obtained patterns have been studied and compared with those of a reference 2H-NbSe2 single crystal. We found that the observed vortex patterns in MgB2 (e.g., stripes, clusters) appear due to competing vortex-vortex interactions as suggested by the theory of type-1.5 superconductivity.
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/119429
DOI :	10.1103/PhysRevB.85.094511

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Open access	Gutierrez-PRB-2012.pdf	Copyright 2012 by the American Physical Society	Publisher postprint	1.09 MB	View/Open

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