Title :
Magnetic property calculations for B2-CoxAl1-x structures at the interface of Co-Al multilayer
Author :
Kim, Sang-Pil ; Chung, Yong-Chae
Author_Institution :
Dept. of Ceramic Eng., Hanyang Univ., Seoul, South Korea
Abstract :
The magnetic property of B2-CoxAl1-x as a function of Co atomic concentration was investigated using the ab initio method. The antistructured (AS) supercell model based on B2 structure was employed to calculate the magnetic moment of the CoxAl1-x compounds originated from spontaneous intermixing of Co atoms with Al surface atoms. In the case of Al-rich CoxAl1-x, no apparent ferromagnetism was represented. However, the magnetic moment was calculated to be rapidly increased with Co concentration in the range above 50 atomic % and was saturated at a level of a pure HCP Co system. Ferromagnetism in CoxAl1-x alloys can be attributed to the existence of local BCC-Co and local AS-Co atoms.
Keywords :
ab initio calculations; aluminium alloys; cobalt alloys; density functional theory; ferromagnetic materials; giant magnetoresistance; magnetic moments; magnetic multilayers; Co; ab initio method; atomic concentration; ferromagnetism; giant magnetoresistance; interface mixing; magnetic moment; magnetic property calculations; multilayer; Aluminum alloys; Atomic layer deposition; Cobalt alloys; Giant magnetoresistance; Magnetic devices; Magnetic materials; Magnetic moments; Magnetic multilayers; Magnetic properties; Tunneling magnetoresistance; Co–Al; electronic structure; giant magnetoresistance (GMR); interface mixing; magnetic property;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.854705
