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.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Reimann T,Mühlbauer S,Schulz M,Betz B,Kaestner A,Pipich V,Böni P,Grünzweig Cdoi
10.1038/ncomms9813subject
Has Abstractpub_date
2015-11-02 00:00:00pages
8813issn
2041-1723pii
ncomms9813journal_volume
6pub_type
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