Journal Article

FZJ-2019-05195

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Universal behavior of the intermediate mixed state domain formation in superconducting niobium

Backs, A. (Corresponding author)MLZ*TUM* ; Schulz, M.MLZ*TUM* ; Pipich, V.FZJ* ; Kleinhans, M.MLZ*TUM* ; Böni, P.MLZ*TUM* ; Mühlbauer, S. (Collaboration author)MLZ*TUM*

2019
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/23210  doi:10.1103/PhysRevB.100.064503

Abstract: In the intermediate mixed state (IMS) of type-II/1 superconductors, vortex lattice (VL) and Meissner state domains coexist due to a partially attractive vortex interaction. Using a neutron-based multiscale approach combined with magnetization measurements, we study the continuous decomposition of a homogeneous VL into increasingly dense domains in the IMS in bulk niobium samples of varying purity. We find a universal temperature dependence of the vortex spacing, closely related to the London penetration depth and independent of the external magnetic field. The rearrangement of vortices occurs even in the presence of a flux freezing transition, i.e., pronounced pinning, indicating a breakdown of pinning at the onset of the vortex attraction.

Keyword(s): Magnetic Materials (1st) ; Magnetism (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS-FRM-II)
2. Neutronenstreuung (JCNS-1)
3. Technologientransfer und Unternehmensgründung (PTJ-GTI)

Research Program(s):

1. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)
2. 6G15 - FRM II / MLZ (POF3-6G15) (POF3-6G15)
3. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Experiment(s):

1. ANTARES: Cold neutron radiography and tomography station (SR4a)
2. SANS-1: Small angle neutron scattering (NL4a)
3. KWS-3: Very small angle scattering diffractometer with focusing mirror (NL3auS)
4. PGAA: Prompt gamma activation analysis (NL4b)

Appears in the scientific report 2019

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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