Mn${}_m$Tc${}_n$ nanoalloy clusters obey Vegard's law : A first principles prediction

Abstract

With a view to gain an understanding about the alloying tendency of bimetallic nano alloy clusters of isoelectronics constituents, we studied the structural and mixing behaviors of Mn${}_m$Tc${}_n$ alloy clusters with $m+n=$13 for all possible compositions, using first principles electronic structure calculations. Our study reports a favorable mixing tendency for the alloy clusters. The average bond lengths of the minimum energy structures show an overall linear variation with concentrations, indicating a Vegard's law like variation for the nano alloy clusters, though the optimized structures undergo a structural transition from a closed and compact structure for the Mn-rich alloy clusters to an open layered like structure for the Tc-rich alloy clusters. We figure out a continuous and smooth interplay between hybridization and magnetization properties of the alloy clusters, which plays a vital role for the Vegard's law like variation in their average bond lengths.

13 pages and 4 figures

References in corpus (2)

• Engineering the magnetic properties of the Mn${}_{13}$ cluster by doping
• Origin of the anomalous Slater-Pauling curve in cobalt-manganese alloy clusters