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Size effect on the magnetism of nanocrystalline Ni films at ambient temperature
Sun Changqing * #
Nanyang Technological University
*Correspondence author
#Submitted by
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Funding: none
Opened online:13 July 2005
Accepted by: none
Citation: Sun Changqing.Size effect on the magnetism of nanocrystalline Ni films at ambient temperature[OL]. [13 July 2005] http://en.paper.edu.cn/en_releasepaper/content/2439
 
 
Size effect on the magnetization and the coercivity of nanocrystalline Ni films has been examined at room temperature. Agreement between modeling predictions and measurements reveals that the size-suppressed magnetization results from the drop of spin-spin exchange energy due to the coordination number (CN) imperfection of atoms near the surface edges, and that the size-enhanced coercivity arises from intergrain interaction that is proportional to the inverse of particle size. Findings herewith and reported previously on the size-induced lattice contraction and Curie temperature suppression evidence the significance of atomic CN imperfection on the unusual behavior of a ferromagnetic nanosolid.
Keywords:Nanostrucure, thermal stability, magnetization.
 
 
 

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