Correlated variation of melting and Curie temperatures of nickel clusters

The temperature-dependent study of magnetic properties of NiN clusters is presented, which reveals an intriguing relationship between Curie TC,N and melting Tmelt,N temperatures. Interestingly, both exhibit similar variation with cluster size; that is, their values are lower than their corresponding bulk values and approach their respective bulk value asymptotically as the cluster size increases. This similarity is justified using model calculations within the mean-field theory applied separately to the surface and core regions and is further quantified as a linear relationship between TC,N and Tmelt,N for a large range of cluster sizes.

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