Title :
Formation of uncompensated spins by substitution of Mg for Co in antiferromagnetic Co1-x MgxO
Author :
Hong, J. ; Leo, T. ; Smith, D.J. ; Berkowitz, A.E.
Author_Institution :
Univ. of California-San Diego, La Jolla
Abstract :
In the present study, the atomic structure of Co1-xMgxO was modeled and the density of uncompensated spins due to the presence of Mg atoms was calculated as a function of Mg concentration, x. The results were also compared with experimental measurements of exchange bias field (Hex) of Co/Co1-xMgxO bilayers, and with the ther-moremanent moments (TRM) of Co1-xMgxO. The formation of uncompensated spins in AFM CoO with substitution of Co atoms with non-magnetic Mg atoms was calculated from a direct modeling of the atomic structure, and their effects on the exchange coupled bilayers were confirmed.
Keywords :
antiferromagnetic materials; cobalt; cobalt compounds; exchange interactions (electron); ferromagnetic materials; magnetic moments; magnetic thin films; thermomagnetic effects; Co-CoMgO; antiferromagnetism; atomic structure; bilayers; exchange bias field; exchange coupling; thermoremanent moments; uncompensated spins; Anisotropic magnetoresistance; Antiferromagnetic materials; Astronomy; Atomic layer deposition; Atomic measurements; Magnetic recording; Nearest neighbor searches; Physics; Temperature measurement; Transmission line measurements;
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
DOI :
10.1109/INTMAG.2006.374994
