Figure 1

(Color online) Curie and melting (inset) temperatures for ${\mathrm{Ni}}_N$ clusters. The main graph shows the Curie temperature $T_{C,N}^{\mathit{cl}}$ obtained by various methods. Results of the present work are indicated with filled magenta squares, while the predictions of Eq. (5) are indicated by stars. The experimental values of the Curie temperatures of the bulk Ni are indicated by the black dashed line. The inset shows the melting curves $\left(T_{\mathit{\text{melt}},N}^{\mathit{cl}}\right)$. The black curve and solid circles show the prediction of Eq. (1) according to Ref. 4; red curve and solid squares are the (interpolated) prediction (obtained using the data of Refs. 5, 7); open red squares refer to results for $T_{\mathit{\text{melt}},N}^{\mathit{cl}}$ of the present work. The experimental values of the melting temperatures of the bulk Ni are indicated by the blue dashed line.Reuse & Permissions

Figure 2

(Color online) Temperature variation of the average MM per cluster atom for the clusters ${\mathrm{Ni}}_N$, $N=43$, 80, 147, 177, and 201 as obtained within the present work along with experimental data from Refs. 11, 12, 13. The temperature uncertainty in all the results of Apsel et al. (Ref. 12) is the same as the one indicated for ${\mathrm{Ni}}_{43}$.Reuse & Permissions

Figure 3

(Color online) Plot of $T_{\mathit{\text{melt}},N}^{\mathit{cl}}$ as a function of $T_{C,N}^{\mathit{cl}}$ for the ${\mathrm{Ni}}_N$ clusters studied in the present work, $N=43$, 80, 147, 177, and 201. The Lindemann index for ${\mathrm{Ni}}_{43}$ is shown in the inset (see also Ref. 18).Reuse & Permissions