Magneto-optical observation of mutual phase-locking in a pair of spin-torque vortex oscillators

Author

Keatley, P.S. ; Sani, S. ; Hrkac, G. ; Mohseni, S. ; Durrenfeld, P. ; Akerman, J. ; Hicken, R.

Author_Institution

Sch. of Phys. & Astron., Univ. of Exeter, Exeter, UK

fYear

2015

fDate

11-15 May 2015

Firstpage

1

Lastpage

1

Abstract

A combination of RF electrical characterization and time-resolved scanning Kerr microscopy has been used to image the magnetization dynamics excited in the continuous film NiFe free layer of a pair of nanocontact spin torque vortex oscillators (NC-STVOs). The NC-STVO is composed of Pd/Cu/Co/Cu/NiFe/Cu/Pd spin valve stack fabricated on a SiO₂ substrate. 2-terminal magnetoresistance measurements are carried out in parallel electrical configuration for RF electrical characterization.

Keywords

Kerr magneto-optical effect; cobalt; copper; iron alloys; magnetic multilayers; magnetisation; magnetoresistance; nanocontacts; nickel alloys; optical microscopy; palladium; spin dynamics; spin valves; time resolved spectra; 2-terminal magnetoresistance measurements; Pd-Cu-Co-Cu-NiFe-Cu-Pd; RF electrical characterization; SiO₂; magnetization dynamics; magneto-optical observation; mutual phase-locking; nanocontact spin torque vortex oscillators; parallel electrical configuration; spin valve stack; time-resolved scanning Kerr microscopy; Magnetic resonance imaging; Magnetic separation; Magnetization; Orbits; Oscillators; Radio frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference (INTERMAG), 2015 IEEE

Conference_Location

Beijing

Print_ISBN

978-1-4799-7321-7

Type

conf

DOI

10.1109/INTMAG.2015.7156846

Filename

7156846