We combine wideband (1–20 GHz) Corbino Disk and Dielectric Resonator (8.2 GHz) techniques to study the microwave properties in Nb/PdNi/Nb trilayers, grown by UHV dc magnetron sputtering, composed by Nb layers of nominal thickness dS = 15 nm, and a ferromagnetic PdNi layer of thicknesses dF = 1, 2, 8 and 9 nm. We focus on the vortex state. Magnetic fields up to Hc2 were applied. The microwave resistivity at fixed H/Hc2 increases with dF , eventually exceeding the Bardeen–Stephen flux-flow value. Vortex pinning is very weak at large dF .

Torokhtii, K., Pompeo, N., Meneghini, C., C., A., C., C., E. A., I., et al. (2012). Microwave properties of Nb/PdNi/Nb trilayers. Observation of flux flow in excess of Bardeen-Stephen theory. JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 26, 571-574 [10.1007/s10948-012-1795-7].

Microwave properties of Nb/PdNi/Nb trilayers. Observation of flux flow in excess of Bardeen-Stephen theory

TOROKHTII, KOSTIANTYN;POMPEO, NICOLA;MENEGHINI, CARLO;SILVA, Enrico
2012-01-01

Abstract

We combine wideband (1–20 GHz) Corbino Disk and Dielectric Resonator (8.2 GHz) techniques to study the microwave properties in Nb/PdNi/Nb trilayers, grown by UHV dc magnetron sputtering, composed by Nb layers of nominal thickness dS = 15 nm, and a ferromagnetic PdNi layer of thicknesses dF = 1, 2, 8 and 9 nm. We focus on the vortex state. Magnetic fields up to Hc2 were applied. The microwave resistivity at fixed H/Hc2 increases with dF , eventually exceeding the Bardeen–Stephen flux-flow value. Vortex pinning is very weak at large dF .
Torokhtii, K., Pompeo, N., Meneghini, C., C., A., C., C., E. A., I., et al. (2012). Microwave properties of Nb/PdNi/Nb trilayers. Observation of flux flow in excess of Bardeen-Stephen theory. JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 26, 571-574 [10.1007/s10948-012-1795-7].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/118528
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 12
  • ???jsp.display-item.citation.isi??? 10
social impact