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Field‐Tuneable Diamagnetism in Ferromagnetic–Superconducting Core–Shell Structures
Author(s) -
Müller André,
Dale Sara E. C.,
Engbarth Miles A.,
Bending Simon J.,
Peter Laurence M.,
Knittel Andreas,
Fangohr Hans
Publication year - 2011
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201100063
Subject(s) - diamagnetism , condensed matter physics , superconductivity , materials science , ferromagnetism , magnetization , magnetic field , shell (structure) , field (mathematics) , core (optical fiber) , compensation (psychology) , physics , psychology , mathematics , quantum mechanics , psychoanalysis , pure mathematics , composite material
Three dimensional ferromagnet–superconductor core–shell structures are realized by electrocrystallisation and their magnetic properties investigated. We observe fully re‐entrant core superconductivity in increasing fields that survives well above the bulk critical field due to compensation effects. The net measured magnetization of optimized structures could be switched from absolute para(ferro‐)magnetic to diamagnetic by tuning the external magnetic field. Micromagnetic simulations of the structures are in good qualitative agreement with our results.