Evidence for polyicosahedral structure in ammoniated iron, cobalt, and nickel clusters

1992 ◽  
Vol 96 (11) ◽  
pp. 8267-8274 ◽  
Author(s):  
E. K. Parks ◽  
B. J. Winter ◽  
T. D. Klots ◽  
S. J. Riley
Keyword(s):  
Iron Cobalt ◽  
Nickel Clusters ◽  
Cobalt And Nickel

MAGNETISM IN TRANSITION-METAL CLUSTERS FROM THE ATOM TO THE BULK

1996 ◽  
Vol 03 (01) ◽  
pp. 429-434 ◽  
Author(s):  
I.M.L. BILLAS ◽  
A. CHÂTELAIN ◽  
W.A. de HEER
Keyword(s):  
Molecular Beam ◽  
Magnetic Moments ◽  
Beam Deflection ◽  
Transition Metal Clusters ◽  
Iron Cluster ◽  
Iron Cobalt ◽  
Nickel Clusters ◽  
Magnetic Shell ◽  
Superparamagnetic Clusters ◽  
Cobalt And Nickel

Molecular beam deflection measurements of small iron, cobalt, and nickel clusters show how magnetism develops as the cluster size is increased from several tens to several hundreds of atoms for temperatures from 80 and 1000 K. Cluster magnetization is found to be superparamagnetic for rotationally warm clusters, where it follows the Langevin function. The magnetization of rotationally cold clusters is anomalous: it is strongly reduced and nonlinear with the applied field. For superparamagnetic clusters, the magnetic moments can be determined from the magnetization. We find that ferromagnetism occurs even for the smallest sizes: for clusters with less than about 30 atoms the magnetic moments are atom-like and as the size is increased up to 700 atoms they approach the bulk limit, with oscillations probably caused by surface-induced spin-density waves. The trends are explained in a magnetic shell model. The magnetic properties of iron cluster show anomalies, suggesting that a high moment to low moment crystallographic phase transition in Fe clusters occurs at relatively low temperatures.

Experimental specific heat of iron, cobalt, and nickel clusters studied in a molecular beam

2000 ◽  
Vol 62 (11) ◽  
pp. 7491-7501 ◽  
Author(s):  
Daniele Gerion ◽  
Armand Hirt ◽  
I. M. L. Billas ◽  
A. Châtelain ◽  
W. A. de Heer
Keyword(s):  
Specific Heat ◽  
Molecular Beam ◽  
Iron Cobalt ◽  
Nickel Clusters ◽  
Cobalt And Nickel

Magnetism from the Atom to the Bulk in Iron, Cobalt, and Nickel Clusters

Science ◽  
1994 ◽  
Vol 265 (5179) ◽  
pp. 1682-1684 ◽  
Author(s):  
I. M.L. Billas ◽  
A. Chatelain ◽  
W. A. de Heer
Keyword(s):  
Iron Cobalt ◽  
Nickel Clusters ◽  
Cobalt And Nickel

scholarly journals Spin and orbital magnetic moments of size-selected iron, cobalt, and nickel clusters

2014 ◽  
Vol 90 (18) ◽  
Author(s):  
A. Langenberg ◽  
K. Hirsch ◽  
A. Ławicki ◽  
V. Zamudio-Bayer ◽  
M. Niemeyer ◽  
...  
Keyword(s):  
Magnetic Moments ◽  
Iron Cobalt ◽  
Nickel Clusters ◽  
Cobalt And Nickel

Progress in preparation and characterization of silylene iron, cobalt and nickel complexes

2021 ◽  
Author(s):  
Wenjing Yang ◽  
Yanhong Dong ◽  
Hongjian Sun ◽  
Xiaoyan Li
Keyword(s):  
Nickel Complexes ◽  
Electron Cloud ◽  
Synthesis And Characterization ◽  
Iron Cobalt ◽  
Cloud Density ◽  
Cobalt And Nickel

The synthesis and characterization of Fe, Co and Ni complexes supported by silylene ligands in recent ten years are summarized. Due to the decrease of electron cloud density on Si...

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