Item Details

Print View

Magnetic Properties of Cobalt and Chromium Clusters

Payne, Forrest William
Format
Thesis/Dissertation; Online
Author
Payne, Forrest William
Advisor
Bloomfield, Lou
Howe, James
Fowler, Michael
Abstract
We have used the Stern-Gerlach deflection technique to study magnetism in cobalt clusters of 13-187 atoms and chromium clusters with between 20-133 atoms. These clusters were observed at temperatures ranging from 60K to 250K and at magnetic field gradients up to 360 T/m. Using superparamagnetic theory we have determined the moment per atom for each cluster size and find enhanced magnetism due to reduced dimensionality of the clusters. Remarkably, we find that we are capable of making chromium clusters in two magnetically distinguishable forms for each cluster size with ≥ 34 atoms. We attribute this observation to the presence of structural isomers. To my lovely wife Mary, and To Aubin and Rayla. Note: Abstract extracted from PDF text
Language
English
Published
University of Virginia, Department of Physics, PHD (Doctor of Philosophy), 2007
Published Date
2007-01-01
Degree
PHD (Doctor of Philosophy)
Collection
Libra ETD Repository
In CopyrightIn Copyright
▾See more
▴See less

Availability

Read Online