Volume 88, Number 2, October 2009
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||04 November 2009|
Decoupling of magnetic core and shell contributions in antiferromagnetic Co3O4 nanostructures
Experimentalphysik IV, Ruhr-Universität Bochum - D-44780 Bochum, Germany, EU
2 Max-Planck Institut für Kohlenforschung - D-45470 Mülheim an der Ruhr, Germany, EU
Accepted: 1 October 2009
The magnetic behavior of antiferromagnetic nanostructures is usually dominated by a core-shell structure. Here we report on a magnetometry study on antiferromagnetic Co3O4 nanostructures showing a magnetic decoupling of the core and its surface contribution below a critical structure size. Systems with sizes larger than 8 nm yield a common coupled magnetometric behavior of core and shell. However, for smaller structure sizes the core and shell contributions show independent magnetization signatures indicating a decoupling scenario.
PACS: 75.75.+a – Magnetic properties of nanostructures / 75.50.Ee – Antiferromagnetics / 62.23.Hj – Nanowires
© EPLA, 2009
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