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Superconducting spin switch with perpendicular magnetic anisotropy

Singh, A.; Sürgers, C.; Löhneysen, H.von

In a superconducting spin switch consisting of ferromagnet-superconductor-ferromagnet (FSF) triple layers, the superconducting transition temperature Tc can be controlled by switching the individual magnetization directions of the F layers from parallel (P) to antiparallel (AP) orientation. Here we study this effect on a Nb layer sandwiched between two ferromagnetic Co∕Pt multilayers (ML) with perpendicular magnetic anisotropy. The coercive fields of the top and bottom ML are different so that a P or AP orientation of the F magnetizations can be easily achieved. Tc is considerably higher in the P configuration when compared to the AP configuration. By comparison with a sample, where an insulating oxide layer is introduced between F and S on both sides of the S layer we confirm that the Tc difference is due to the proximity effect. FSF triple layers with out-of-plane anisotropy may have potential applications in ultrahigh-density magnetic

DOI: 10.1103/PhysRevB.75.024513
Zitationen: 45
Web of Science
Zitationen: 46
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Institut für Festkörperphysik (IFP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2007
Sprache Englisch
Identifikator ISSN: 0163-1829
KITopen-ID: 1000013563
HGF-Programm 43.02.03 (POF I, LK 01)
Erschienen in Physical Review B
Band 75
Heft 2
Seiten 024513/1 - 5
Nachgewiesen in Scopus
Web of Science
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