Magneto-optical observation of picosecond dynamics of single nanomagnets.
We report measurements of picosecond dynamics of individual nickel nanomagnets as a function of magnet dimension, aspect ratio, and magnetic environment. Spatial sensitivity to nanomagnet diameters as small as 125 nm is achieved by use of cavity enhancement of the magneto-optic Kerr effect (CE-MOKE). The importance of single-particle measurements without ensemble effects for extracting the size dependence of the intrinsic nanomagnet material properties is demonstrated.
Barman
Anjan
A
School of Engineering, University of California Santa Cruz, 1156 High Street, Santa Cruz, California 95064, USA.
Wang
Suqin
S
Maas
Jeffrey D
JD
Hawkins
Aaron R
AR
Kwon
Sunghoon
S
Liddle
Alexander
A
Bokor
Jeffrey
J
Schmidt
Holger
H