Record link: 
http://hdl.handle.net/20.500.12708/138964
-
Title: 
Nature of the magnetic moment of cobalt in ordered FeCo alloy
en
Citation: 
Gerasimov, A., Nordström, L., Khmelevskyi, S., Mazurenko, V. V., & Khvashnin, Y. O. (2021). Nature of the magnetic moment of cobalt in ordered FeCo alloy. Journal of Physics: Condensed Matter, 33(16), 165801. https://doi.org/10.1088/1361-648x/abdfff
-
Publisher DOI: 
10.1088/1361-648x/abdfff
-
Publication Type: 
Article - Original Research Article
en
Language: 
English
-
Authors: 
Gerasimov, A. 
Nordström, L. 
Khmelevskyi, Sergii 
Mazurenko, V.V. 
Khvashnin, Y.O. 
-
Organisational Unit: 
E057-15 - Fachbereich Center for Computational Materials Science and Engineering 
-
Journal: 
Journal of Physics: Condensed Matter 
-
ISSN: 
0953-8984
-
Date (published): 
2021
-
Number of Pages: 
11
-
Publisher: 
IOP PUBLISHING LTD
-
Peer reviewed: 
Yes
-
Keywords: 
Condensed Matter Physics; General Materials Science
-
Abstract: 
Themagnetsaretypicallyclassified intoStonerandHeisenbergtype,dependingonthe itinerantorlocalizednatureofthe constituentmagneticmoments.Inthiswork,weinvestigate theoreticallythebehaviourofthe magneticmomentsofironandcobaltintheirB2-ordered alloy.Theresultsbasedonlocalspindensityapproximationforthedensityfunctionaltheory (DFT)suggestthatthe Comagneticmomentstronglydependsonthedirectionsofthe surroundingmagneticmoments,whichusuallyindicatestheStoner-typemechanismof magnetism.Thisisconsistentwiththedisorderedlocal momentpictureoftheparamagnetic state, wherethemagneticmomentofcobaltgetssubstantiallysuppressed.Wearguethatthisis duetothe lackofstrongon-siteelectroncorrelations,whichwetake intoaccountby employingacombinationofDFTanddynamicalmean-fieldtheory(DMFT).WithinLDA+ DMFT,we finda substantialquasiparticlemassrenormalizationanda nonFermi-liquid behaviourofFe-3d orbitals.Theresultingspectralfunctionsareinverygoodagreementwith measuredspin-resolvedphotoemissionspectra.Ourresultssuggestthatlocal correlationsplay anessentialroleinstabilizingarobustlocalmomentonCointheabsenceofmagneticorderat hightemperatures.
en
Research Areas: 
Computational Materials Science: 100%
-
Science Branch: 
Physik, Astronomie
Chemie
-
Appears in Collections:
Article

Show full item record

Items in reposiTUm are protected by copyright, with all rights reserved, unless otherwise indicated.

Page view(s)

37
checked on Nov 3, 2023

Google ScholarTM

Check