Femtosecond laser induced magnetization dynamics in single nanomagnets

Author

Barman, A. ; Wang, S. ; Qureshi, N. ; Lowther, M.A. ; Hawkins, A.R. ; Kwon, S. ; Liddle, A. ; Bokor, J. ; Schmidt, H.

Author_Institution

California Univ., Santa Cruz

fYear

2006

fDate

8-12 May 2006

Firstpage

66

Lastpage

66

Abstract

Here, we present magnetization dynamics measurements in 150nm thick Ni magnets with diameters from 5mum to 125nm by optical pump-probe technique. To the best of our knowledge this is the first ever report of magnetization dynamics study of single nanomagnets down to 125nm by the time-resolved magneto-optical technique. The combination of novel cavity enhancement of magneto-optical Kerr effect and 100 fs laser pulsewidth has allowed us to study the dynamics with a unique 100fs time resolution and 100nm spatial sensitivity.

Keywords

Kerr magneto-optical effect; magnetisation; magnets; nanostructured materials; nickel; time resolved spectra; Ni; cavity enhancement; femtosecond laser; magnetization dynamics; magneto-optical Kerr effect; nickel magnets; optical pump probe; single nanomagnets; time 100 fs; time-resolved magneto-optical technique; Kerr effect; Magnetization; Magnetooptic effects; Magnets; Nonlinear optics; Optical pumping; Optical sensors; Pump lasers; Thickness measurement; Ultrafast optics;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2006. INTERMAG 2006. IEEE International

Conference_Location

San Diego, CA

Print_ISBN

1-4244-1479-2

Type

conf

DOI

10.1109/INTMAG.2006.375566

Filename

4261500