Chemical identification of icosahedral structure for cobalt and nickel clusters

1991 ◽  
Vol 19 (1-4) ◽  
pp. 375-380 ◽  
Author(s):  
B. J. Winter ◽  
T. D. Klots ◽  
E. K. Parks ◽  
S. J. Riley
Keyword(s):  
Chemical Identification ◽  
Icosahedral Structure ◽  
Nickel Clusters ◽  
Cobalt And Nickel

Icosahedral structure in hydrogenated cobalt and nickel clusters

1991 ◽  
Vol 95 (12) ◽  
pp. 8919-8930 ◽  
Author(s):  
T. D. Klots ◽  
B. J. Winter ◽  
E. K. Parks ◽  
S. J. Riley
Keyword(s):  
Icosahedral Structure ◽  
Nickel Clusters ◽  
Cobalt And Nickel

ChemInform Abstract: Icosahedral Structure in Hydrogenated Cobalt and Nickel Clusters.

ChemInform ◽  
2010 ◽  
Vol 23 (16) ◽  
pp. no-no
Author(s):  
T. D. KLOTS ◽  
B. J. WINTER ◽  
E. K. PARKS ◽  
S. J. RILEY
Keyword(s):  
Icosahedral Structure ◽  
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.

Analysis of structures and melting properties of the 19-atom Ni–Co clusters

2014 ◽  
Vol 28 (25) ◽  
pp. 1450171 ◽  
Author(s):  
Shi-Wei Ren ◽  
Jing-Wei Sun ◽  
Yan-Zhong Hao
Keyword(s):  
Melting Temperature ◽  
Nickel Atom ◽  
Melting Temperatures ◽  
Pure Cobalt ◽  
Melting Phenomenon ◽  
Nickel Clusters ◽  
Melting Properties ◽  
Mixed Clusters ◽  
Dynamics Method ◽  
Cobalt And Nickel

In this paper, by using the classical molecular dynamics method and the GEAM potential, the geometric structure and the melting properties of the 19-atom Ni – Co clusters with different compositions are studied. It is found that all the clusters have the double icosahedron structures although some of the structures are slightly deformed. With the increase of the temperature, a pre-melting phenomenon is observed. The pre-melting temperatures of the pure cobalt and nickel clusters are very close. But on the whole, the pre-melting temperature decreases with the increase of the number of the nickel atom for the mixed clusters. The effects of the substitution atoms on the melting temperature of the clusters are similar to that on the pre-melting temperature although there are some oscillations in the decrease process. The mechanism of these findings are also investigated and analyzed.

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

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

Adsorbate binding energies for ammonia on cobalt and nickel clusters

1991 ◽  
pp. 381-384 ◽  
Author(s):  
B. J. Winter ◽  
T. D. Klots ◽  
E. K. Parks ◽  
S. J. Riley
Keyword(s):  
Binding Energies ◽  
Nickel Clusters ◽  
Cobalt And Nickel

A family of cubane cobalt and nickel clusters: Syntheses, structures and magnetic properties

2013 ◽  
Vol 396 ◽  
pp. 119-125 ◽  
Author(s):  
Shu-Hua Zhang ◽  
Yi Dong Zhang ◽  
Hua Hong Zou ◽  
Jing Jing Guo ◽  
He Ping Li ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Nickel Clusters ◽  
Cobalt And Nickel
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