Magnetic anisotropy study of ion-beam synthesized cobalt nanocrystals Academic Article

abstract

• The magnetic properties of Co nanocrystals in crystalline Al2O3 and amorphous SiO2 are investigated. In contrast to the SiO2 matrix, the Al2O3 matrix provides higher magnetic anisotropy and coercive field for Co nanocrystals. Using x-ray photoemission spectroscopy, it is found that a CoAl2O4 layer forms in Co implanted region. Transmission electron microscopy shows that this CoAl2O4 layer is grown epitaxially around Co nanocrystals. The higher coercive field of the Co nanocrystals in Al2O3 is attributed to the presence of antiferromagnetic CoAl2O4 layers.

authors

• Nastasi, Michael

published proceedings

• APPLIED PHYSICS LETTERS

author list (cited authors)

• Lee, J., Hundley, M. F., Thompson, J. D., Schulze, R. K., Jung, H. S., Valdez, J. A., Nastasi, M., & Zhang, X.

citation count

• 6

publication date

• October 2006

publisher

• AIP Publishing  Publisher

keywords

• 40 Engineering
• 51 Physical Sciences
• 5104 Condensed Matter Physics

Digital Object Identifier (DOI)

• 10.1063/1.2364176

start page

• 182502

volume

• 89

issue

• 18

URL

• http://dx.doi.org/10.1063/1.2364176