Title :
Permalloy nanoparticles generated by laser ablation
Author :
Lee, Jaemyoung ; Becker, Michael F. ; Brock, James R. ; Keto, John W. ; Walser, Rodger M.
Author_Institution :
Center for Magnetics, Texas Univ., Austin, TX, USA
fDate :
9/1/1996 12:00:00 AM
Abstract :
We describe a new method for producing ultrafine magnetic particles that employs pulsed-laser particle ablation. Pulsed-laser radiation with wavelength of 248 nm was used to ablate 1 to 10 μm diameter Permalloy microparticles under normal atmospheric conditions. The ejected nanoparticles were collected on silicon substrates for further analysis. Scanning electron micrographs of the samples were analyzed by computer aided image processing to determine the effect of laser fluence on the particle size distribution. Results showed that mean particle diameters were in the range from 60 to 90 nm, and that the particle size distributions were closely log-normal
Keywords :
Permalloy; ferromagnetic materials; magnetic particles; nanostructured materials; pulsed laser deposition; scanning electron microscopy; 1 to 10 mum; 248 nm; 60 to 90 nm; FeNi; Permalloy; SEM; Si substrates; computer aided image processing; laser fluence effect; nanoparticles; particle size distribution; pulsed-laser particle ablation; ultrafine magnetic particles; Atmospheric waves; Distributed computing; Electrons; Image analysis; Image processing; Laser ablation; Magnetic analysis; Magnetic particles; Nanoparticles; Silicon;
Journal_Title :
Magnetics, IEEE Transactions on
