Volume 77, Number 5, March 2007
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||22 February 2007|
Exchange bias in granular CoO layers due to random magnetic anisotropy
Institut für Physik, Humboldt-Universität zu Berlin - Newtonstrasse 15, 12489 Berlin, Germany
Accepted: 19 January 2007
The structural and magnetic properties of granular CoO layers have been investigated by scanning tunneling microscopy (STM) and magnetization measurements. The CoO shows a strong exchange anisotropy which is attributed to an interaction between the antiferromagnetic order and uncompensated spins in the antiferromagnetic material. No appreciable amount of ferromagnetic material is needed to establish characteristic properties of exchange bias such as the shift of the magnetic hysteresis loop. A new approach to the problem of exchange anisotropy is suggested which is based on random magnetic anisotropy of CoO nanoparticles.
PACS: 75.70.-i – Magnetic properties of thin films, surfaces, and interfaces / 75.50.Ee – Antiferromagnetics / 75.50.Lk – Spin glasses and other random magnets
© Europhysics Letters Association, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.