Poster (Invited)

FZJ-2020-01042

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Domain-Superconductivity in Nb/FePd with lateral inhomogeneous magnetization

STELLHORN, A.FZJ* ; SARKAR, A.FZJ* ; KENTZINGER, E.FZJ* ; SCHRÖDER, S. ; ABULADZE, G. ; WASCHK, M. ; BHATNAGAR, T.FZJ* ; Schöffmann, P.FZJ* ; FU, Z. ; PIPICH, V.FZJ* ; KRYCKA, K. ; BARTHEL, J.FZJ* ; BRÜCKEL, T.FZJ*

2020

Abstract: We aim at understanding the proximity effects in the superconductor-ferromagnet (S/F) interface of Nb(S)/FePd(F) thin film heterostructures, prepared by MBE growth. Proximity effects at S/F interfaces with an inhomogeneous magnetic field texture result in various effects, like domain-wall superconductivity. To reveal the physical origin of each effect, we compare samples with S/F in direct proximity and S/F decoupled by a thin MgO layer. Measurements of the resistivity and magnetization show striking differences in their critical temperature and the critical field values. According to our results, we ascribe the observed domain-wall and reverse-domain superconductivity to the long-range magnetic interactions. Using polarized neutron scattering techniques, we focus on revealing the lateral magnetic depth profile of the heterostructures as function of temperature.

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Contributing Institute(s):

1. Streumethoden (JCNS-2)
2. Streumethoden (PGI-4)
3. JARA-FIT (JARA-FIT)
4. Materialwissenschaft u. Werkstofftechnik (ER-C-2)

Research Program(s):

1. 144 - Controlling Collective States (POF3-144) (POF3-144)
2. 524 - Controlling Collective States (POF3-524) (POF3-524)
3. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)
4. 6213 - Materials and Processes for Energy and Transport Technologies (POF3-621) (POF3-621)
5. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Appears in the scientific report 2020

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