Title :
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
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;
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
DOI :
10.1109/INTMAG.2006.375566
