Journal Article

FZJ-2020-02815

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Tailoring superconducting states in superconductor-ferromagnet hybrids

Stellhorn, A. (Corresponding author)FZJ* ; Sarkar, A. ; Kentzinger, E.FZJ* ; Barthel, J.FZJ* ; Di Bernardo, A. ; Nandi, S.FZJ* ; Zakalek, P.FZJ* ; Schubert, J.FZJ* ; Brueckel, T.FZJ*

2020
IOP [London]

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Please use a persistent id in citations: http://hdl.handle.net/2128/25627  doi:10.1088/1367-2630/abaa02

Abstract: We present results of a comprehensive investigation of two phenomena arising in superconductor(S)/ferromagnet(F) heterostructures of Nb on FePd with a lateral magnetic domain pattern: domain-superconductivity and spin-triplet Cooper pair generation. Resistivity measurements in a magnetic field applied out-of-plane to a Nb/FePd (S/F) sample with high magnetocrystalline anisotropy give evidence of stray field generated domain-wall- and reverse-domain-superconductivity. A corresponding bilayer comprising low magnetocrystalline anisotropy exhibits spin-triplet Cooper pair generation and a notable high variation of the S critical temperature due to spin-triplet generation (ΔTc) of 100 mK in an in-plane applied field. Using reference samples we can clearly distinguish stray field from proximity effects. The relevance of the characteristic S and F length scales related to the observed proximity effects is discussed.

Note: FZJ A-081: with JCNS, HRSTEM and EDX of magnetic multilayer structures

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Contributing Institute(s):

1. Materialwissenschaft u. Werkstofftechnik (ER-C-2)
2. Streumethoden (JCNS-2)
3. High Brilliance Source (JCNS-HBS)
4. Streumethoden (PGI-4)
5. JARA-FIT (JARA-FIT)

Research Program(s):

1. 143 - Controlling Configuration-Based Phenomena (POF3-143) (POF3-143)
2. 144 - Controlling Collective States (POF3-144) (POF3-144)
3. 524 - Controlling Collective States (POF3-524) (POF3-524)
4. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)
5. 6213 - Materials and Processes for Energy and Transport Technologies (POF3-621) (POF3-621)
6. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Appears in the scientific report 2020

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