Magnetic and mechanical effects of Mn substitutions in AlFe2B2

The mechanical and magnetic properties of the newly discovered MAB-phase class of materials based upon AlFe2B2 were investigated. The samples were synthesised from stoichiometric amounts of all constituent elements. X-ray diffraction shows that the main phase is orthorhombic with an elongated b-axis, similar to AlFe2B2. The low hardness and visual inspection of the samples after deformation indicate that these compounds are deformed via a delamination process. When substituting iron in AlFe2B2 with manganese, the magnetism in the system goes from being ferro- to antiferromagnetic via a disordered ferrimagnetic phase exhibited by AlFeMnB2. Density functional theory calculations indicate a weakening of the magnetic interactions among the transitions metal ions as iron is substituted by manganese in AlFe2B2. The Mn-Mn exchange interactions in AlMn2B2 are found to be very small.

Andersson, Mikael (author)
Iusan, DianaUppsala universitet,Materialteori(Swepub:uu)diius030 (author)
Delczeg-Czirjak, Erna KrisztinaUppsala universitet,Materialteori(Swepub:uu)ernde783 (author)
Jansson, Ulf,1960-Uppsala universitet,Oorganisk kemi(Swepub:uu)uja03434 (author)
Nordblad, PerUppsala universitet,Fasta tillståndets fysik(Swepub:uu)pno26208 (author)
Sahlberg, Martin,1981-Uppsala universitet,Oorganisk kemi(Swepub:uu)masah021 (author)
Uppsala universitetOorganisk kemi (creator_code:org_t)

In:Journal of Magnetism and Magnetic Materials: Elsevier BV482, s. 54-600304-88531873-4766

By the author/editor: Cedervall, Johan; Andersson, Mikae ...; Iusan, Diana; Delczeg-Czirjak, ...; Jansson, Ulf, 19 ...; Nordblad, Per; show more...; Sahlberg, Martin ...; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Inorganic Chemis ...

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