Web Release Date: November 15,
Magneto-Optical Observation of Picosecond Dynamics of Single Nanomagnets
and
School of Engineering, University of California Santa Cruz, 1156 High Street, Santa Cruz, California 95064, ECEn Department, Brigham Young University, 459 Clyde Building, Provo, Utah 84602, and Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720
Received October 5, 2006
Revised November 2, 2006
Abstract:
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.
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