Emergence of noncollinear magnetic ordering in small magnetic clusters: Mn${}_n$ and As@Mn${}_n$

Abstract

Using first-principles density functional calculations, we have studied the magnetic ordering in pure Mn${}_n$ ($n=2-$10, 13, 15, 19) and As@Mn${}_n$ ($n=1-$10) clusters. Although, for both pure and doped manganese clusters, there exists many collinear and noncollinear isomers close in energy, the smaller clusters with $n⩽$5 have collinear magnetic ground state and the emergence of noncollinear ground states is seen for $n⩾$6 clusters. Due to strong $p-d$ hybridization in As@Mn${}_n$ clusters, the binding energy is substantially enhanced and the magnetic moment is reduced compared to the corresponding pure Mn${}_n$ clusters.

arXiv comment10 Pages and 5 Figures

References in corpus (13)

• Spin Ice State in Frustrated Magnetic Pyrochlore Materials
• Effects of annealing time on defect-controlled ferromagnetism in Ga1-xMnxAs
• Saturated Ferromagnetism and Magnetization Deficit in Optimally Annealed (Ga,Mn)As Epilayers
• Ferromagnetism in Mn doped GaAs due to substitutional-interstitial complexes
• Structure, electronic properties and magnetic transition in manganese clusters
• Role of Disorder in Mn:GaAs, Cr:GaAs, and Cr:GaN
• Noncollinear Ferromagnetism in (III,Mn)V Semiconductors
• Noncollinear magnetic ordering in small Chromium Clusters
• Cross-sectional STM of Mn-doped GaAs: theory and experiment
• Noncollinear cluster magnetism in the framework of the Hubbard model
• Disorder-induced noncollinear ferromagnetism in models for (III,Mn)V semiconductors
• Positional Disorder, Spin-Orbit Coupling and Frustration in GaMnAs
• Large Magnetic Moments of Arsenic-Doped Mn Clusters and their Relevance to Mn-Doped III-V Semiconductor Ferromagnetism

Cited by in corpus (4)

• Magnetism in small bimetallic Mn-Co clusters
• Ab initio study of structural stability of small 3$d$ late transition metal clusters : Interplay of magnetization and hybridization
• Engineering the magnetic properties of the Mn${}_{13}$ cluster by doping
• Magnetism in stoichiometric and off-stoichiometric MnO clusters: Insights from {\it ab initio} theory