In order to overcome the current limitations of metallic systems for microwave applications, columnar arrays of Co nanowires with variable wire lengths were electrochemically grown using anodic alumina membranes with thickness of ~100 μm and pore diameters around 70 nm. The Co nanowires tend to present a strong hcp-magnetocrystalline anisotropy directed in the plane perpendicular to the wires axis. The combination of shape anisotropy directed along the wire axis (depending on the wire length) and the hcp magneto-crystalline anisotropy (due to structure) causes a shift from in-plane to out-of-plane spontaneous magnetization with relevant saturation and remanence magnetization values. Different types of magnetic behavior may then lead to ferromagnetic resonance frequencies shifting from 20 to 40 GHz at zero applied field.

Tunable frequency ferromagnetic resonance of Co nanowire arrays / Pasquale, Massimo; Olivetti, ELENA SONIA; Sasso, CARLO PAOLO; Coisson, Marco. - (2013), pp. 277-279. [10.1109/RWS.2013.6486713]

Tunable frequency ferromagnetic resonance of Co nanowire arrays

PASQUALE, MASSIMO;OLIVETTI, ELENA SONIA;SASSO, CARLO PAOLO;COISSON, MARCO
2013

Abstract

In order to overcome the current limitations of metallic systems for microwave applications, columnar arrays of Co nanowires with variable wire lengths were electrochemically grown using anodic alumina membranes with thickness of ~100 μm and pore diameters around 70 nm. The Co nanowires tend to present a strong hcp-magnetocrystalline anisotropy directed in the plane perpendicular to the wires axis. The combination of shape anisotropy directed along the wire axis (depending on the wire length) and the hcp magneto-crystalline anisotropy (due to structure) causes a shift from in-plane to out-of-plane spontaneous magnetization with relevant saturation and remanence magnetization values. Different types of magnetic behavior may then lead to ferromagnetic resonance frequencies shifting from 20 to 40 GHz at zero applied field.
File in questo prodotto:
File Dimensione Formato  
06486713.pdf

solo utenti autorizzati

Tipologia: final published article (publisher’s version)
Licenza: Non Pubblico - Accesso privato/ristretto
Dimensione 90.15 kB
Formato Adobe PDF
90.15 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

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/11696/54765
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? ND
social impact