Title :
Transport properties of Nb/PdNi/Nb trilayers at microwave frequencies
Author :
Torokhtii, Kostiantyn ; Pompeo, Nicola ; Meneghini, C. ; Attanasio, C. ; Cirillo, C. ; Ilyina, E.A. ; Sarti, S. ; Silva, Enrico
Author_Institution :
Dip. di Ing., Univ. Roma Tre, Rome, Italy
Abstract :
The superconducting properties of S/F/S (Superconductor/Ferromagnet/Superconductor) heterostructures have been studied using wideband microwave measurements. Nb/PdNi/Nb trilayers with different F layer thickness have been studied. Measurements show evidence for a progressively weaker vortex pinning with increasing F thickness. However, as it was shown by structural study, this is not a result of disorder in the samples. We argue that the F layer acts on the superconducting state itself, lowering the superfluid density.
Keywords :
ferromagnetic materials; flux pinning; magnetic superconductors; microwave measurement; multilayers; niobium; palladium compounds; superconductivity; F layer thickness; Nb-PdNi-Nb; S/F/S heterostructure; ferromagnet heterostructure; microwave frequency; structural study; superconducting property; superconducting state; superconductor heterostructure; superfluid density; transport property; vortex pinning; wideband microwave measurement; Conductivity; Frequency measurement; Microwave measurement; Niobium; Oscillators; Superconducting epitaxial layers; Superconducting microwave devices;
Conference_Titel :
Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves (MSMW), 2013 International Kharkov Symposium on
Conference_Location :
Kharkiv
Print_ISBN :
978-1-4799-1066-3
DOI :
10.1109/MSMW.2013.6622165
