Magnetic and Magneto-Optical Properties of Fe75-xMn25Gax Heusler-like Compounds

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dc.contributor.authorKrál, Danielcs
dc.contributor.authorBeran, Lukášcs
dc.contributor.authorZelený, Martincs
dc.contributor.authorZemen, Jancs
dc.contributor.authorAntoš, Romancs
dc.contributor.authorHamrle, Jaroslavcs
dc.contributor.authorZázvorka, Jakubcs
dc.contributor.authorRameš, Michalcs
dc.contributor.authorOnderková, Kristýnacs
dc.contributor.authorHeczko, Olegcs
dc.contributor.authorVeis, Martincs
dc.coverage.issue3cs
dc.coverage.volume13cs
dc.date.accessioned2020-12-02T11:55:32Z
dc.date.available2020-12-02T11:55:32Z
dc.date.issued2020-02-04cs
dc.description.abstractFe75-xMn25Gax Heusler-like compounds were investigated in a wide range of Fe/Ga ratios while keeping the Mn content constant and equal 25 at% in order to elucidate the interplay between magnetic properties and composition. Materials were prepared by arc-melting from pure elements and subsequently annealed. Experimental investigations were focused on magnetization behavior in a wide temperature range from 4 to 1000 K and magnetic field up to 9 T. Optical and magneto-optical (MO) measurements were employed to shed more light on the magnetic state and electronic structure of investigated materials. Magnetization measurements indicated that in the vicinity of stoichiometry (Fe2MnGa) the compounds are ferro/ferrimagnetic, whereas the Fe-deficient compound is paramagnetic and at high Fe concentration the antiferromagnetic interaction prevails. Theoretical calculations of corresponding ordered and disordered stoichiometric compounds were carried out and compared to the experiment on the level of net magnetic moment as well as magneto-optical spectra. This comparison suggests that the Heusler crystal structure, L2(1), is not present even close to stoichiometry. Moreover, the comparison of density of states (DOS) for ordered and disordered structures allowed us to explain missing martensitic transformation (MT) in investigated materials.en
dc.formattextcs
dc.format.extent1-12cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMaterials . 2020, vol. 13, issue 3, p. 1-12.en
dc.identifier.doi10.3390/ma13030703cs
dc.identifier.issn1996-1944cs
dc.identifier.other161953cs
dc.identifier.urihttp://hdl.handle.net/11012/195747
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofMaterialscs
dc.relation.urihttps://www.mdpi.com/1996-1944/13/3/703cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1996-1944/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectHeusler compoundsen
dc.subjectFe-Mn-Gaen
dc.subjectmartensitic transformationen
dc.subjectCurie pointen
dc.subjectmagneto-opticsen
dc.subjectab initioen
dc.titleMagnetic and Magneto-Optical Properties of Fe75-xMn25Gax Heusler-like Compoundsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-161953en
sync.item.dbtypeVAVen
sync.item.insts2020.12.03 08:54:45en
sync.item.modts2020.12.03 08:14:15en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav materiálových věd a inženýrstvícs
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