Electric dipole polarizabilities of Ni12–58

Abstract

Articles you may be interested inSite-specific analysis of dipole polarizabilities of heterogeneous systems: Iron-doped Si n (n = 1-14) clusters J. Chem. Phys. 138, 094304 (2013); 10.1063/1.4793276 Thermally induced polarizabilities and dipole moments of small tin clustersThe electric dipole polarizabilities of Ni 12 -Ni 58 have been measured via a molecular beam deflection experiment. The majority of the clusters display polarizabilities ␣ between 4 and 6 Å 3 per atom, below the atomic value of 6.8 Å 3 and above that predicted for ideal conducting spheres. Local extrema in ␣/atom are observed for certain Ni n . In particular, those clusters that adopt closely packed or quasispherical structures ͑e.g., Ni 38 , Ni 55 ) display local minima, while Ni 21 , Ni 22 , Ni 25 , and Ni 49-54 , each an icosahedron or polyicosahedron with ''missing'' atoms, display anomalously high values. The relationship between the polarizabilities of nickel clusters and their shapes and structures is discussed.

Nonclassical dipoles in cold niobium clusters

“…In contrast to the electric deflections of normal clusters, [13][14][15] the deflections of niobium clusters at low temperatures show several anomalies. In particular (i) the maximum deflection is linearly proportional to the applied electric field; (ii) the deflected beam profiles are asymmetric; (iii) at higher temperatures the spontaneous dipoles vanish and the deflections are due to the polarizability of the cluster.…”

Measurement of magnetic moments of freeBiNMnMclusters

“…1 It has also revealed that small rhodium clusters are ferromagnetic with magnetic moments per atom of as much as 0.8 Bohr magnetons ͑ B ͒, 2 while bulk rhodium is paramagnetic. Manganese clusters were found to be ferromagnetic or ferrimagnetically ordered in the size range from Mn 5 to Mn 99 , 3,4 with magnetic moments per atom in the range 0.3-1 B .…”

Structural and energetic properties of nickel clusters: 2⩽N⩽150

“…Of the experimental studies on Ni N clusters, 29,30,31,32,33,34,35,36,37 the chemical-probe experiments 29,30,31,32,33,34,35,36 have given very valuable information on the structure of the smaller clusters. On the other hand, results for medium and large Ni clusters, 37 obtained by performing near-threshold photoionization and time-of-flight mass spectroscopy can be used in identifying particularly stable clusters and, subsequently, in providing information on growth modes.…”