Magnetic and mechanical effects of Mn substitutions in AlFe 2 B 2
Artikel i vetenskaplig tidskrift, 2019

The mechanical and magnetic properties of the newly discovered MAB-phase class of materials based upon AlFe 2 B 2 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 AlFe 2 B 2 . 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 AlFe 2 B 2 with manganese, the magnetism in the system goes from being ferro- to antiferromagnetic via a disordered ferrimagnetic phase exhibited by AlFeMnB 2 . Density functional theory calculations indicate a weakening of the magnetic interactions among the transitions metal ions as iron is substituted by manganese in AlFe 2 B 2 . The Mn-Mn exchange interactions in AlMn 2 B 2 are found to be very small.


X-ray diffraction

Density functional theory

Magnetocaloric materials

Mechanical properties


J. Cedervall

Uppsala universitet

Martin Andersson

Uppsala universitet

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Diana Iuşan

Uppsala universitet

Erna K. Delczeg-Czirjak

Uppsala universitet

U. Jansson

Uppsala universitet

P. Nordblad

Uppsala universitet

M. Sahlberg

Uppsala universitet

Journal of Magnetism and Magnetic Materials

0304-8853 (ISSN)

Vol. 482 54-60


Oorganisk kemi


Den kondenserade materiens fysik



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