In-plane/out-of-plane disorder influence on the magnetic anisotropy of Fe1-yMnyPt-L10 bulk alloy
Cuadrado, Ramón (Institut Català de Nanociència i Nanotecnologia)
Liu, Kai (University of California. Physics Department)
Klemmer, Timothy J. (Seagate Technology)
Chantrell, Roy W. (University of York. Department of Physics)

Date:	2016
Abstract:	The random substitution of a non-magnetic species instead of Fe atoms in FePt-L1 bulk alloy will permit to tune the magnetic anisotropy energy of this material. We have performed by means of first principles calculations a study of Fe MnPt-L1 (y = 0. 0, 0. 08, 0. 12, 0. 17, 0. 22, and 0. 25) bulk alloy for a fixed Pt concentration when the Mn species have ferro-/antiferromagnetic (FM,AFM) alignment at the same(different) atomic plane(s). This substitution will promote several in-plane lattice values for a fixed amount of Mn. Charge hybridization will change compared to the FePt-L1 bulk due to this lattice variation leading to a site resolved magnetic moment modification. We demonstrate that this translates into a total magnetic anisotropy reduction for the AFM phase and an enhancement for the FM alignment. Several geometric configurations were taken into account for a fixed Mn concentration because of different possible Mn positions in the simulation cell.
Grants:	European Commission 281043
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	First-principles calculation ; Geometric configurations ; In-plane lattices ; Lattice variation ; Magnetic anisotropy energy ; Mn concentrations ; Moment modification ; Random substitution
Published in:	Applied physics letters, Vol. 108, Issue 12 (March 2016) , art. 123102, ISSN 1077-3118

DOI: 10.1063/1.4944534

Preprint 6 p, 2.3 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
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Articles > Published articles