Continuously graded anisotropy in single (Fe53Pt47)100-xCux films
Journal article, 2010

We report on continuously graded anisotropy. During deposition, a compositional gradient is achieved by varying the Cu concentration from Cu-rich (Fe53Pt47)70Cu30 to Cu-free Fe53Pt47. The anisotropy gradient is then realized after annealing using the composition dependence of the low-anisotropy (A1) to high-anisotropy (L10) ordering temperature. The critical role of the annealing temperature on the resultant anisotropy gradient is investigated. Magnetic measurements support the creation of an anisotropy gradient in properly annealed films which exhibit both a reduced coercivity and moderate thermal stability. These results demonstrate that an anisotropy gradient can be realized, and tailored, in single continuous films without the need for multilayers.




C. L. Zha

Randy K. Dumas

University of Gothenburg

Yeyu Fang

Valentina Bonanni

Josep Nogués

Johan Åkerman

University of Gothenburg

Applied Physics Letters

0003-6951 (ISSN) 1077-3118 (eISSN)

Vol. 97 18 182504 (3 pages)-

Subject Categories

Condensed Matter Physics



More information