Number of the records: 1

Disorder-induced antiferromagnetic to ferromagnetic transition in magneticoverlayers: (Fe,Mn)/W(001) as a case study

SYSNO ASEP	0357426
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Ostatní články
Title	Disorder-induced antiferromagnetic to ferromagnetic transition in magneticoverlayers: (Fe,Mn)/W(001) as a case study
Author(s)	Kudrnovský, Josef (FZU-D)_{RID, ORCID} Ondráček, Martin (FZU-D)_{RID, ORCID} Bengone, O. (FR) Máca, František (FZU-D)_{RID, ORCID}
Source Title	e-Journal of Surface Science and Nanotechnology - ISSN 1348-0391 Roč. 8, - (2010), s. 184-189
Number of pages	6 s.
Language	eng - English
Country	JP - Japan
Keywords	ab initio calculations ; Green’s function methods ; construction of effective interatomic interactions ; magnetic phase transitions in overlayers
Subject RIV	BM - Solid Matter Physics ; Magnetism
R&D Projects	GA202/07/0456 GA ČR - Czech Science Foundation (CSF)
	OC09028 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	GA202/09/0775 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z10100520 - FZU-D (2005-2011)
	AV0Z10100521 - FZU-D (2005-2011)
DOI	10.1380/ejssnt.2010.184
Annotation	The magnetic phase stability of the random FexMn1-x monolayer on the bcc-W(001) substrate is studied from first-principles. The exchange interactions among two-types of magnetic atoms in the overlayer are estimated and used to construct the random classical two-dimensional Heisenberg Hamiltonian. The stability of such effective Hamiltonian is then studied with respect to a broad class of magnetic arrangements which include also possible spin-spiral structures. We have found that exchange interactions between Fe-spin are antiferromagnetic while those between Mn-spins are ferromagnetic over the whole concentration range. This pronounced frustration leads to a complex behavior in which the c(2x2) antiferromagnetic state for Fe-monolayer goes over to complex incommensurate spin-spiral magnetic structures with increasing Mn-content. A spin-spiral state with a large period was found also for the Mn-monolayer case in agreement with a recent experiment.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2011

Number of the records: 1