Journal Article

FZJ-2015-07010

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Visualizing the morphology of vortex lattice domains in a bulk type-II superconductor

Reimann, T. (Corresponding author)TUM* ; Mühlbauer, S. ; Schulz, M. (Corresponding author) ; Betz, B. ; Kaestner, A. ; Pipich, V. ; Böni, P. ; Grünzweig, C. (Corresponding author)

2015
Nature Publishing Group London

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Please use a persistent id in citations: http://hdl.handle.net/2128/9543  doi:10.1038/ncomms9813

Abstract: Alike materials in the solid state, the phase diagram of type-II superconductors exhibit crystalline, amorphous, liquid and spatially inhomogeneous phases. The multitude of different phases of vortex matter has thence proven to act as almost ideal model system for the study of both the underlying properties of superconductivity but also of general phenomena such as domain nucleation and morphology. Here we show how neutron grating interferometry yields detailed information on the vortex lattice and its domain structure in the intermediate mixed state of a type-II niobium superconductor. In particular, we identify the nucleation regions, how the intermediate mixed state expands, and where it finally evolves into the Shubnikov phase. Moreover, we complement the results obtained from neutron grating interferometry by small-angle neutron scattering that confirm the spatially resolved morphology found in the intermediate mixed state, and very small-angle neutron scattering that confirm the domain structure of the vortex lattice.

Keyword(s): Basic research (1st) ; Key Technologies (1st) ; Magnetism (2nd) ; Condensed Matter Physics (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS (München) ; Jülich Centre for Neutron Science JCNS (München) ; JCNS-FRM-II)
2. Neutronenstreuung (Neutronenstreuung ; JCNS-1)

Research Program(s):

1. 6G15 - FRM II / MLZ (POF3-6G15) (POF3-6G15)
2. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)
3. NMI3-II - Neutron Scattering and Muon Spectroscopy Integrated Initiative (283883) (283883)

Experiment(s):

1. SANS-1: Small angle neutron scattering (NL4a)
2. KWS-3: Very small angle scattering diffractometer with focusing mirror (NL3auS)
3. ANTARES: Cold neutron radiography and tomography station (SR4a)

Appears in the scientific report 2015

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